diff --git a/.gitignore b/.gitignore
index 38adffa6..cd1e2011 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,5 @@ coverage
 *.njsproj
 *.sln
 *.sw?
+
+.env
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 439c35b3..af51d171 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,51 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+## [2.16.0](https://github.com/CorentinTh/it-tools/compare/v2.15.0...v2.16.0) (2022-12-21)
+
+
+### Features
+
+* **search-bar:** use cmd + k to focus on mac ([bf88836](https://github.com/CorentinTh/it-tools/commit/bf88836dbe4037019e9545deaae1db06e5768cfb))
+* **tool:** improved favorite tool management ([af075dc](https://github.com/CorentinTh/it-tools/commit/af075dccccec959a0863e6d11516206860bed91f))
+* **tools:** added favorite tool handling ([4cd809b](https://github.com/CorentinTh/it-tools/commit/4cd809bd0c94836532f58a2ec6aa131694cce10d))
+* **tracker:** added actions monitoring ([bfc2e24](https://github.com/CorentinTh/it-tools/commit/bfc2e24bbfc08f67ed9c9b1d93474029bc01dc8b))
+
+
+### Refactors
+
+* **clean:** removed empty style tag ([cf723f1](https://github.com/CorentinTh/it-tools/commit/cf723f144ee865b6de7323d3be58eb7a9586fa56))
+* **clean:** removed unused import ([4087285](https://github.com/CorentinTh/it-tools/commit/40872859a580a20bb838b79db2b3c88c00995e37))
+* **menu:** improve support button ([679dd1c](https://github.com/CorentinTh/it-tools/commit/679dd1c1f6265227cc9db60c55d83f8eaf8f72b4))
+* **tracker:** better tracker injection ([def60e7](https://github.com/CorentinTh/it-tools/commit/def60e7248003e74ed67e9ff116b438bab410a92))
+
+## [2.15.0](https://github.com/CorentinTh/it-tools/compare/v2.14.1...v2.15.0) (2022-12-16)
+
+
+### Features
+
+* **search-bar:** better search back result ([71e98e9](https://github.com/CorentinTh/it-tools/commit/71e98e93e5752cba934f67d679088524c4d3d2ad))
+
+
+### Bug Fixes
+
+* **integer-base-converter:** handle non-decimal char and better error message ([8476cf3](https://github.com/CorentinTh/it-tools/commit/8476cf319b7ebae87c7928592604a54833ac56ef))
+* **tool-card:** correct text color on light mode for card description ([acf8bc1](https://github.com/CorentinTh/it-tools/commit/acf8bc11dbab85ab361edbe400ebbe5e52a11b89))
+
+
+### Refactors
+
+* **search-bar:** improved tool fuzzy search ([1b5d4e7](https://github.com/CorentinTh/it-tools/commit/1b5d4e72bdb222dd721a1e484c3e5d73bb62d2b1))
+
+### [2.14.1](https://github.com/CorentinTh/it-tools/compare/v2.14.0...v2.14.1) (2022-11-23)
+
+## [2.14.0](https://github.com/CorentinTh/it-tools/compare/v2.13.0...v2.14.0) (2022-11-23)
+
+
+### Features
+
+* **new-tool:** chmod calculator ([35b5187](https://github.com/CorentinTh/it-tools/commit/35b518711938c2bc88f35d104bb35d9956f0c267))
+
 ## [2.13.0](https://github.com/CorentinTh/it-tools/compare/v2.11.0...v2.13.0) (2022-11-14)
 
 
diff --git a/README.md b/README.md
index efcc5538..0ba0dcc6 100644
--- a/README.md
+++ b/README.md
@@ -10,46 +10,53 @@ You have an idea of a tool? Submit a [feature request](https://github.com/Corent
 
 ## Contribute
 
-### Recommended IDE Setup
+## Recommended IDE Setup
 
-[VSCode](https://code.visualstudio.com/) + [Volar](https://marketplace.visualstudio.com/items?itemName=johnsoncodehk.volar) (and disable Vetur) + [TypeScript Vue Plugin (Volar)](https://marketplace.visualstudio.com/items?itemName=johnsoncodehk.vscode-typescript-vue-plugin).
+[VSCode](https://code.visualstudio.com/) + [Volar](https://marketplace.visualstudio.com/items?itemName=Vue.volar) (and disable Vetur) + [TypeScript Vue Plugin (Volar)](https://marketplace.visualstudio.com/items?itemName=Vue.vscode-typescript-vue-plugin).
 
-### Node version
+## Type Support for `.vue` Imports in TS
 
-Ensure you have the correct node/npm version
+TypeScript cannot handle type information for `.vue` imports by default, so we replace the `tsc` CLI with `vue-tsc` for type checking. In editors, we need [TypeScript Vue Plugin (Volar)](https://marketplace.visualstudio.com/items?itemName=Vue.vscode-typescript-vue-plugin) to make the TypeScript language service aware of `.vue` types.
+
+If the standalone TypeScript plugin doesn't feel fast enough to you, Volar has also implemented a [Take Over Mode](https://github.com/johnsoncodehk/volar/discussions/471#discussioncomment-1361669) that is more performant. You can enable it by the following steps:
+
+1. Disable the built-in TypeScript Extension
+   1. Run `Extensions: Show Built-in Extensions` from VSCode's command palette
+   2. Find `TypeScript and JavaScript Language Features`, right click and select `Disable (Workspace)`
+2. Reload the VSCode window by running `Developer: Reload Window` from the command palette.
+
+## Customize configuration
+
+See [Vite Configuration Reference](https://vitejs.dev/config/).
+
+## Project Setup
 
 ```sh
-nvm use
+pnpm install
 ```
 
-### Project Setup
+### Compile and Hot-Reload for Development
 
 ```sh
-npm install
+pnpm dev
 ```
 
-#### Compile and Hot-Reload for Development
+### Type-Check, Compile and Minify for Production
 
 ```sh
-npm run dev
+pnpm build
 ```
 
-#### Type-Check, Compile and Minify for Production
+### Run Unit Tests with [Vitest](https://vitest.dev/)
 
 ```sh
-npm run build
+pnpm test
 ```
 
-#### Run Unit Tests with [Vitest](https://vitest.dev/)
+### Lint with [ESLint](https://eslint.org/)
 
 ```sh
-npm run test
-```
-
-#### Lint with [ESLint](https://eslint.org/)
-
-```sh
-npm run lint
+pnpm lint
 ```
 
 ### Create a new tool
@@ -68,12 +75,9 @@ Coded with ❤️ by [Corentin Thomasset](//corentin-thomasset.fr).
 
 This project is continuously deployed using [vercel.com](https://vercel.com).
 
-
-
 <a href="https://www.producthunt.com/posts/it-tools?utm_source=badge-featured&utm_medium=badge&utm_souce=badge-it&#0045;tools" target="_blank"><img src="https://api.producthunt.com/widgets/embed-image/v1/featured.svg?post_id=345793&theme=light" alt="IT&#0032;Tools - Collection&#0032;of&#0032;handy&#0032;online&#0032;tools&#0032;for&#0032;devs&#0044;&#0032;with&#0032;great&#0032;UX | Product Hunt" style="width: 250px; height: 54px;" width="250" height="54" /></a>
 <a href="https://www.producthunt.com/posts/it-tools?utm_source=badge-top-post-badge&utm_medium=badge&utm_souce=badge-it&#0045;tools" target="_blank"><img src="https://api.producthunt.com/widgets/embed-image/v1/top-post-badge.svg?post_id=345793&theme=light&period=daily" alt="IT&#0032;Tools - Collection&#0032;of&#0032;handy&#0032;online&#0032;tools&#0032;for&#0032;devs&#0044;&#0032;with&#0032;great&#0032;UX | Product Hunt" style="width: 250px; height: 54px;" width="250" height="54" /></a>
 
-
 ## License
 
 This project is under the [GNU GPLv3](LICENSE).
diff --git a/package.json b/package.json
index eaa89011..6c8aa1c3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "it-tools",
-  "version": "2.13.0",
+  "version": "2.16.0",
   "description": "Collection of handy online tools for developers, with great UX. ",
   "keywords": [
     "productivity",
@@ -45,6 +45,7 @@
     "crypto-js": "^4.1.1",
     "date-fns": "^2.29.3",
     "figue": "^1.2.0",
+    "fuse.js": "^6.6.2",
     "highlight.js": "^11.6.0",
     "json5": "^2.2.1",
     "jwt-decode": "^3.1.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index f61621e5..b7f2a228 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -38,6 +38,7 @@ specifiers:
   eslint-plugin-import: ^2.26.0
   eslint-plugin-vue: ^8.7.1
   figue: ^1.2.0
+  fuse.js: ^6.6.2
   highlight.js: ^11.6.0
   jsdom: ^19.0.0
   json5: ^2.2.1
@@ -81,6 +82,7 @@ dependencies:
   crypto-js: 4.1.1
   date-fns: 2.29.3
   figue: 1.2.0
+  fuse.js: 6.6.2
   highlight.js: 11.6.0
   json5: 2.2.1
   lodash: 4.17.21
@@ -4054,6 +4056,11 @@ packages:
     resolution: {integrity: sha512-xckBUXyTIqT97tq2x2AMb+g163b5JFysYk0x4qxNFwbfQkmNZoiRHb6sPzI9/QV33WeuvVYBUIiD4NzNIyqaRQ==}
     dev: true
 
+  /fuse.js/6.6.2:
+    resolution: {integrity: sha512-cJaJkxCCxC8qIIcPBF9yGxY0W/tVZS3uEISDxhYIdtk8OL93pe+6Zj7LjCqVV4dzbqcriOZ+kQ/NE4RXZHsIGA==}
+    engines: {node: '>=10'}
+    dev: false
+
   /gensync/1.0.0-beta.2:
     resolution: {integrity: sha512-3hN7NaskYvMDLQY55gnW3NQ+mesEAepTqlg+VEbj7zzqEMBVNhzcGYYeqFo/TlYz6eQiFcp1HcsCZO+nGgS8zg==}
     engines: {node: '>=6.9.0'}
diff --git a/src/components/FavoriteButton.vue b/src/components/FavoriteButton.vue
new file mode 100644
index 00000000..4b7f561f
--- /dev/null
+++ b/src/components/FavoriteButton.vue
@@ -0,0 +1,38 @@
+<template>
+  <n-tooltip trigger="hover">
+    <template #trigger>
+      <n-button circle quaternary :type="buttonType" :style="{ opacity: isFavorite ? 1 : 0.2 }" @click="toggleFavorite">
+        <template #icon>
+          <n-icon :component="FavoriteFilled" />
+        </template>
+      </n-button>
+    </template>
+    {{ isFavorite ? 'Remove from favorites' : 'Add to favorites' }}
+  </n-tooltip>
+</template>
+
+<script setup lang="ts">
+import { FavoriteFilled } from '@vicons/material';
+import { useToolStore } from '@/tools/tools.store';
+import type { Tool } from '@/tools/tools.types';
+import { computed, toRefs } from 'vue';
+
+const toolStore = useToolStore();
+
+const props = defineProps<{ tool: Tool }>();
+const { tool } = toRefs(props);
+
+const isFavorite = computed(() => toolStore.isToolFavorite({ tool }));
+const buttonType = computed(() => (isFavorite.value ? 'primary' : 'default'));
+
+function toggleFavorite(event: MouseEvent) {
+  event.preventDefault();
+
+  if (toolStore.isToolFavorite({ tool })) {
+    toolStore.removeToolFromFavorites({ tool });
+    return;
+  }
+
+  toolStore.addToolToFavorites({ tool });
+}
+</script>
diff --git a/src/components/MenuIconItem.vue b/src/components/MenuIconItem.vue
index 0909e567..a08fe241 100644
--- a/src/components/MenuIconItem.vue
+++ b/src/components/MenuIconItem.vue
@@ -6,11 +6,11 @@
 </template>
 
 <script setup lang="ts">
-import type { ITool } from '@/tools/tool';
+import type { Tool } from '@/tools/tools.types';
 import { useThemeVars } from 'naive-ui';
 import { toRefs } from 'vue';
 
-const props = defineProps<{ tool: ITool }>();
+const props = defineProps<{ tool: Tool }>();
 const { tool } = toRefs(props);
 
 const theme = useThemeVars();
diff --git a/src/components/SearchBar.vue b/src/components/SearchBar.vue
index 7305239e..78d6fd7c 100644
--- a/src/components/SearchBar.vue
+++ b/src/components/SearchBar.vue
@@ -1,36 +1,38 @@
 <script lang="ts" setup>
+import { useFuzzySearch } from '@/composable/fuzzySearch';
+import { useTracker } from '@/modules/tracker/tracker.services';
 import { tools } from '@/tools';
+import type { Tool } from '@/tools/tools.types';
 import { SearchRound } from '@vicons/material';
 import { useMagicKeys, whenever } from '@vueuse/core';
-import { deburr } from 'lodash';
-import { computed, ref } from 'vue';
+import type { NInput } from 'naive-ui';
+import { computed, h, ref } from 'vue';
 import { useRouter } from 'vue-router';
+import SearchBarItem from './SearchBarItem.vue';
+
+const toolToOption = (tool: Tool) => ({ label: tool.name, value: tool.path, tool });
 
 const router = useRouter();
+const { tracker } = useTracker();
+
 const queryString = ref('');
-
-const cleanString = (s: string) => deburr(s.trim().toLowerCase());
-
-const searchableTools = tools.map(({ name, description, keywords, path }) => ({
-  searchableText: [name, description, ...keywords].map(cleanString).join(' '),
-  path,
-  name,
-}));
+const inputEl = ref<HTMLElement>();
+const displayDropDown = ref(true);
+const isMac = computed(() => window.navigator.userAgent.toLowerCase().includes('mac'));
 
 const options = computed(() => {
-  const query = cleanString(queryString.value);
+  if (queryString.value === '') {
+    return tools.map(toolToOption);
+  }
 
-  return searchableTools
-    .filter(({ searchableText }) => searchableText.includes(query))
-    .map(({ name, path }) => ({ label: name, value: path }));
+  return searchResult.value.map(toolToOption);
 });
 
-function onSelect(path: string) {
-  router.push(path);
-  queryString.value = '';
-}
-
-const focusTarget = ref();
+const { searchResult } = useFuzzySearch({
+  search: queryString,
+  data: tools,
+  options: { keys: [{ name: 'name', weight: 2 }, 'description', 'keywords'] },
+});
 
 const keys = useMagicKeys({
   passive: false,
@@ -38,12 +40,40 @@ const keys = useMagicKeys({
     if (e.ctrlKey && e.key === 'k' && e.type === 'keydown') {
       e.preventDefault();
     }
+
+    if (e.metaKey && e.key === 'k' && e.type === 'keydown') {
+      e.preventDefault();
+    }
   },
 });
 
-whenever(keys.ctrl_k, () => {
-  focusTarget.value.focus();
-});
+whenever(keys.ctrl_k, claimFocus);
+whenever(keys.meta_k, claimFocus);
+whenever(keys.escape, releaseFocus);
+
+function renderOption({ tool }: { tool: Tool }) {
+  return h(SearchBarItem, { tool });
+}
+
+function onSelect(path: string) {
+  router.push(path);
+  queryString.value = '';
+}
+
+function claimFocus() {
+  displayDropDown.value = true;
+
+  inputEl.value?.focus();
+}
+
+function releaseFocus() {
+  displayDropDown.value = false;
+}
+
+function onFocus() {
+  tracker.trackEvent({ eventName: 'Search-bar focused' });
+  displayDropDown.value = true;
+}
 </script>
 
 <template>
@@ -51,16 +81,21 @@ whenever(keys.ctrl_k, () => {
     <n-auto-complete
       v-model:value="queryString"
       :options="options"
-      :input-props="{ autocomplete: 'disabled' }"
-      :on-select="onSelect"
+      :on-select="(value) => onSelect(String(value))"
+      :render-label="renderOption"
+      :default-value="'aa'"
+      :get-show="() => displayDropDown"
+      :on-focus="onFocus"
+      @update:value="() => (displayDropDown = true)"
     >
       <template #default="{ handleInput, handleBlur, handleFocus, value: slotValue }">
         <n-input
-          ref="focusTarget"
+          ref="inputEl"
           round
           clearable
-          placeholder="Search a tool... [Ctrl + K]"
+          :placeholder="`Search a tool (use ${isMac ? 'Cmd' : 'Ctrl'} + K to focus)`"
           :value="slotValue"
+          :input-props="{ autocomplete: 'disabled' }"
           @input="handleInput"
           @focus="handleFocus"
           @blur="handleBlur"
@@ -73,9 +108,3 @@ whenever(keys.ctrl_k, () => {
     </n-auto-complete>
   </div>
 </template>
-
-<style lang="less" scoped>
-// ::v-deep(.n-input__border) {
-//     border: none;
-// }
-</style>
diff --git a/src/components/SearchBarItem.vue b/src/components/SearchBarItem.vue
new file mode 100644
index 00000000..ca792686
--- /dev/null
+++ b/src/components/SearchBarItem.vue
@@ -0,0 +1,45 @@
+<script lang="ts" setup>
+import type { Tool } from '@/tools/tools.types';
+import { toRefs } from 'vue';
+
+const props = defineProps<{ tool: Tool }>();
+const { tool } = toRefs(props);
+</script>
+
+<template>
+  <div class="search-bar-item">
+    <n-icon class="icon" :component="tool.icon" />
+
+    <div>
+      <div class="name">{{ tool.name }}</div>
+      <div class="description">{{ tool.description }}</div>
+    </div>
+  </div>
+</template>
+
+<style lang="less" scoped>
+.search-bar-item {
+  padding: 10px;
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+
+  .icon {
+    font-size: 30px;
+    margin-right: 10px;
+    opacity: 0.7;
+  }
+
+  .name {
+    font-weight: bold;
+    font-size: 15px;
+    line-height: 1;
+    margin-bottom: 5px;
+  }
+
+  .description {
+    opacity: 0.7;
+    line-height: 1;
+  }
+}
+</style>
diff --git a/src/components/ToolCard.vue b/src/components/ToolCard.vue
index 7a05db97..79586f81 100644
--- a/src/components/ToolCard.vue
+++ b/src/components/ToolCard.vue
@@ -3,17 +3,21 @@
     <n-card class="tool-card">
       <n-space justify="space-between" align="center">
         <n-icon class="icon" size="40" :component="tool.icon" />
-        <n-tag
-          v-if="tool.isNew"
-          size="small"
-          class="badge-new"
-          round
-          type="success"
-          :bordered="false"
-          :color="{ color: theme.primaryColor, textColor: theme.tagColor }"
-        >
-          New
-        </n-tag>
+        <n-space align="center">
+          <n-tag
+            v-if="tool.isNew"
+            size="small"
+            class="badge-new"
+            round
+            type="success"
+            :bordered="false"
+            :color="{ color: theme.primaryColor, textColor: theme.tagColor }"
+          >
+            New
+          </n-tag>
+
+          <favorite-button :tool="tool" />
+        </n-space>
       </n-space>
       <n-h3 class="title">
         <n-ellipsis>{{ tool.name }}</n-ellipsis>
@@ -29,11 +33,12 @@
 </template>
 
 <script setup lang="ts">
-import type { ITool } from '@/tools/tool';
+import type { Tool } from '@/tools/tools.types';
 import { useThemeVars } from 'naive-ui';
 import { toRefs } from 'vue';
+import FavoriteButton from './FavoriteButton.vue';
 
-const props = defineProps<{ tool: ITool & { category: string } }>();
+const props = defineProps<{ tool: Tool & { category: string } }>();
 const { tool } = toRefs(props);
 const theme = useThemeVars();
 </script>
@@ -50,7 +55,7 @@ a {
 
   .icon {
     opacity: 0.6;
-    color: #ffffff;
+    color: v-bind('theme.textColorBase');
   }
 
   .title {
@@ -59,7 +64,7 @@ a {
 
   .description {
     opacity: 0.6;
-    color: #ffffff;
+    color: v-bind('theme.textColorBase');
     margin: 5px 0;
   }
 }
diff --git a/src/composable/fuzzySearch.ts b/src/composable/fuzzySearch.ts
new file mode 100644
index 00000000..b46f9de6
--- /dev/null
+++ b/src/composable/fuzzySearch.ts
@@ -0,0 +1,23 @@
+import { get, type MaybeRef } from '@vueuse/core';
+import Fuse from 'fuse.js';
+import { computed } from 'vue';
+
+export { useFuzzySearch };
+
+function useFuzzySearch<Data>({
+  search,
+  data,
+  options = {},
+}: {
+  search: MaybeRef<string>;
+  data: Data[];
+  options?: Fuse.IFuseOptions<Data>;
+}) {
+  const fuse = new Fuse(data, options);
+
+  const searchResult = computed(() => {
+    return fuse.search(get(search)).map(({ item }) => item);
+  });
+
+  return { searchResult };
+}
diff --git a/src/layouts/base.layout.vue b/src/layouts/base.layout.vue
index 23e23d22..4ee2997d 100644
--- a/src/layouts/base.layout.vue
+++ b/src/layouts/base.layout.vue
@@ -1,13 +1,15 @@
 <script lang="ts" setup>
 import { NIcon, useThemeVars, type MenuGroupOption } from 'naive-ui';
-import { h } from 'vue';
+import { computed, h } from 'vue';
 import { RouterLink, useRoute } from 'vue-router';
 import { Heart, Menu2, Home2 } from '@vicons/tabler';
 import { toolsByCategory } from '@/tools';
 import { useStyleStore } from '@/stores/style.store';
 import { config } from '@/config';
 import MenuIconItem from '@/components/MenuIconItem.vue';
-import type { ITool } from '@/tools/tool';
+import type { Tool } from '@/tools/tools.types';
+import { useToolStore } from '@/tools/tools.store';
+import { useTracker } from '@/modules/tracker/tracker.services';
 import SearchBar from '../components/SearchBar.vue';
 import HeroGradient from '../assets/hero-gradient.svg?component';
 import MenuLayout from '../components/MenuLayout.vue';
@@ -19,19 +21,30 @@ const styleStore = useStyleStore();
 const version = config.app.version;
 const commitSha = config.app.lastCommitSha.slice(0, 7);
 
-const makeLabel = (tool: ITool) => () => h(RouterLink, { to: tool.path }, { default: () => tool.name });
-const makeIcon = (tool: ITool) => () => h(MenuIconItem, { tool });
+const makeLabel = (tool: Tool) => () => h(RouterLink, { to: tool.path }, { default: () => tool.name });
+const makeIcon = (tool: Tool) => () => h(MenuIconItem, { tool });
 
-const menuOptions: MenuGroupOption[] = toolsByCategory.map((category) => ({
-  label: category.name,
-  key: category.name,
-  type: 'group',
-  children: category.components.map((tool) => ({
-    label: makeLabel(tool),
-    icon: makeIcon(tool),
-    key: tool.name,
+const { tracker } = useTracker();
+
+const toolStore = useToolStore();
+
+const menuOptions = computed<MenuGroupOption[]>(() =>
+  [
+    ...(toolStore.favoriteTools.length > 0
+      ? [{ name: 'Your favorite tools', components: toolStore.favoriteTools }]
+      : []),
+    ...toolsByCategory,
+  ].map((category) => ({
+    label: category.name,
+    key: category.name,
+    type: 'group',
+    children: category.components.map((tool) => ({
+      label: makeLabel(tool),
+      icon: makeIcon(tool),
+      key: tool.name,
+    })),
   })),
-}));
+);
 </script>
 
 <template>
@@ -145,6 +158,9 @@ const menuOptions: MenuGroupOption[] = toolsByCategory.map((category) => ({
               href="https://github.com/sponsors/CorentinTh"
               rel="noopener"
               target="_blank"
+              class="support-button"
+              :bordered="false"
+              @click="() => tracker.trackEvent({ eventName: 'Support button clicked' })"
             >
               Buy me a coffee
               <n-icon v-if="!styleStore.isSmallScreen" :component="Heart" style="margin-left: 5px" />
@@ -170,6 +186,19 @@ const menuOptions: MenuGroupOption[] = toolsByCategory.map((category) => ({
 //     background-size: @size @size;
 // }
 
+.support-button {
+  background: rgb(37, 99, 108);
+  background: linear-gradient(48deg, rgba(37, 99, 108, 1) 0%, rgba(59, 149, 111, 1) 60%, rgba(20, 160, 88, 1) 100%);
+  color: #fff;
+  transition: all ease 0.2s;
+
+  &:hover {
+    color: #fff;
+    padding-left: 30px;
+    padding-right: 30px;
+  }
+}
+
 .footer {
   text-align: center;
   color: #838587;
diff --git a/src/layouts/tool.layout.vue b/src/layouts/tool.layout.vue
index bb3665ea..6cccbb05 100644
--- a/src/layouts/tool.layout.vue
+++ b/src/layouts/tool.layout.vue
@@ -3,22 +3,22 @@ import { useRoute } from 'vue-router';
 import { useHead } from '@vueuse/head';
 import type { HeadObject } from '@vueuse/head';
 import { computed } from 'vue';
-import { useThemeVars } from 'naive-ui';
+import FavoriteButton from '@/components/FavoriteButton.vue';
+import type { Tool } from '@/tools/tools.types';
 import BaseLayout from './base.layout.vue';
 
 const route = useRoute();
-const theme = useThemeVars();
 
 const head = computed<HeadObject>(() => ({
   title: `${route.meta.name} - IT Tools`,
   meta: [
     {
       name: 'description',
-      content: route.meta.description,
+      content: route.meta?.description as string,
     },
     {
       name: 'keywords',
-      content: route.meta.keywords,
+      content: ((route.meta.keywords ?? []) as string[]).join(','),
     },
   ],
 }));
@@ -29,22 +29,18 @@ useHead(head);
   <base-layout>
     <div class="tool-layout">
       <div class="tool-header">
-        <n-h1>
-          {{ route.meta.name }}
+        <n-space align="center" justify="space-between" :wrap="false">
+          <n-h1>
+            {{ route.meta.name }}
+          </n-h1>
 
-          <n-tag
-            v-if="route.meta.isNew"
-            round
-            type="success"
-            :bordered="false"
-            :color="{ color: theme.primaryColor, textColor: theme.tagColor }"
-          >
-            New tool
-          </n-tag>
-          <!-- <span class="new-tool-badge">New !</span> -->
-        </n-h1>
+          <div>
+            <favorite-button :tool="{name: route.meta.name} as Tool" />
+          </div>
+        </n-space>
 
         <div class="separator" />
+
         <div class="description">
           {{ route.meta.description }}
         </div>
@@ -92,6 +88,7 @@ useHead(head);
       width: 200px;
       height: 2px;
       background: rgb(161, 161, 161);
+      opacity: 0.2;
 
       margin: 10px 0;
     }
diff --git a/src/modules/tracker/tracker.services.ts b/src/modules/tracker/tracker.services.ts
new file mode 100644
index 00000000..bd3c0ec1
--- /dev/null
+++ b/src/modules/tracker/tracker.services.ts
@@ -0,0 +1,27 @@
+import _ from 'lodash';
+import type Plausible from 'plausible-tracker';
+import { inject } from 'vue';
+
+export { createTrackerService, useTracker };
+
+function createTrackerService({ plausible }: { plausible: ReturnType<typeof Plausible> }) {
+  return {
+    trackEvent({ eventName }: { eventName: string }) {
+      plausible.trackEvent(eventName);
+    },
+  };
+}
+
+function useTracker() {
+  const plausible: ReturnType<typeof Plausible> | undefined = inject('plausible');
+
+  if (_.isNil(plausible)) {
+    throw new Error('Plausible must be instantiated');
+  }
+
+  const tracker = createTrackerService({ plausible });
+
+  return {
+    tracker,
+  };
+}
diff --git a/src/modules/tracker/tracker.types.ts b/src/modules/tracker/tracker.types.ts
new file mode 100644
index 00000000..edf79208
--- /dev/null
+++ b/src/modules/tracker/tracker.types.ts
@@ -0,0 +1,3 @@
+import type { createTrackerService } from './tracker.services';
+
+export type TrackerService = ReturnType<typeof createTrackerService>;
diff --git a/src/pages/About.vue b/src/pages/About.vue
index 7817b508..c033e16b 100644
--- a/src/pages/About.vue
+++ b/src/pages/About.vue
@@ -1,7 +1,9 @@
 <script setup lang="ts">
+import { useTracker } from '@/modules/tracker/tracker.services';
 import { useHead } from '@vueuse/head';
 
 useHead({ title: 'About - IT Tools' });
+const { tracker } = useTracker();
 </script>
 
 <template>
@@ -25,6 +27,7 @@ useHead({ title: 'About - IT Tools' });
         href="https://github.com/sponsors/CorentinTh"
         rel="noopener"
         target="_blank"
+        @click="() => tracker.trackEvent({ eventName: 'Support button clicked' })"
       >
         sponsoring me </n-button
       >.
diff --git a/src/pages/Home.page.vue b/src/pages/Home.page.vue
index 88086ee4..b0b9fc00 100644
--- a/src/pages/Home.page.vue
+++ b/src/pages/Home.page.vue
@@ -1,41 +1,71 @@
 <script setup lang="ts">
-import { toolsWithCategory } from '@/tools';
+import { useToolStore } from '@/tools/tools.store';
 import { Heart } from '@vicons/tabler';
 import { useHead } from '@vueuse/head';
 import ColoredCard from '../components/ColoredCard.vue';
 import ToolCard from '../components/ToolCard.vue';
 
+const toolStore = useToolStore();
+
 useHead({ title: 'IT Tools - Handy online tools for developers' });
 </script>
 
 <template>
   <div class="home-page">
-    <n-grid x-gap="12" y-gap="12" cols="1 400:2 800:3 1200:4 2000:8">
-      <n-gi>
-        <colored-card title="You like it-tools?" :icon="Heart">
-          Give us a star on
-          <a
-            href="https://github.com/CorentinTh/it-tools"
-            rel="noopener"
-            target="_blank"
-            aria-label="IT-Tools' github repository"
-            >github</a
-          >
-          or follow us on
-          <a
-            href="https://twitter.com/ittoolsdottech"
-            rel="noopener"
-            target="_blank"
-            aria-label="IT-Tools' twitter account"
-            >twitter</a
-          >! Thank you
-          <n-icon :component="Heart" />
-        </colored-card>
-      </n-gi>
-      <n-gi v-for="tool in toolsWithCategory" :key="tool.name">
-        <tool-card :tool="tool" />
-      </n-gi>
-    </n-grid>
+    <div class="grid-wrapper">
+      <n-grid x-gap="12" y-gap="12" cols="1 400:2 800:3 1200:4 2000:8">
+        <n-gi>
+          <colored-card title="You like it-tools?" :icon="Heart">
+            Give us a star on
+            <a
+              href="https://github.com/CorentinTh/it-tools"
+              rel="noopener"
+              target="_blank"
+              aria-label="IT-Tools' github repository"
+              >github</a
+            >
+            or follow us on
+            <a
+              href="https://twitter.com/ittoolsdottech"
+              rel="noopener"
+              target="_blank"
+              aria-label="IT-Tools' twitter account"
+              >twitter</a
+            >! Thank you
+            <n-icon :component="Heart" />
+          </colored-card>
+        </n-gi>
+      </n-grid>
+
+      <transition name="height">
+        <div v-if="toolStore.favoriteTools.length > 0">
+          <n-h3>Your favorite tools</n-h3>
+          <n-grid x-gap="12" y-gap="12" cols="1 400:2 800:3 1200:4 2000:8">
+            <n-gi v-for="tool in toolStore.favoriteTools" :key="tool.name">
+              <tool-card :tool="tool" />
+            </n-gi>
+          </n-grid>
+        </div>
+      </transition>
+
+      <div v-if="toolStore.newTools.length > 0">
+        <n-h3>Newest tools</n-h3>
+        <n-grid x-gap="12" y-gap="12" cols="1 400:2 800:3 1200:4 2000:8">
+          <n-gi v-for="tool in toolStore.newTools" :key="tool.name">
+            <tool-card :tool="tool" />
+          </n-gi>
+        </n-grid>
+      </div>
+
+      <n-h3>All the tools</n-h3>
+      <n-grid x-gap="12" y-gap="12" cols="1 400:2 800:3 1200:4 2000:8">
+        <n-gi v-for="tool in toolStore.tools" :key="tool.name">
+          <transition>
+            <tool-card :tool="tool" />
+          </transition>
+        </n-gi>
+      </n-grid>
+    </div>
   </div>
 </template>
 
@@ -43,4 +73,27 @@ useHead({ title: 'IT Tools - Handy online tools for developers' });
 .home-page {
   padding-top: 50px;
 }
+
+.n-h3 {
+  margin-bottom: 10px;
+}
+
+::v-deep(.n-grid) {
+  margin-bottom: 30px;
+}
+
+.height-enter-active,
+.height-leave-active {
+  transition: all 0.5s ease-in-out;
+  overflow: hidden;
+  max-height: 500px;
+}
+
+.height-enter-from,
+.height-leave-to {
+  max-height: 42px;
+  overflow: hidden;
+  opacity: 0;
+  margin-bottom: 0;
+}
 </style>
diff --git a/src/plugins/naive.plugin.ts b/src/plugins/naive.plugin.ts
index fdb1018c..077abf97 100644
--- a/src/plugins/naive.plugin.ts
+++ b/src/plugins/naive.plugin.ts
@@ -54,9 +54,11 @@ import {
   NUpload,
   NUploadDragger,
   NPopover,
+  NCheckbox,
 } from 'naive-ui';
 
 const components = [
+  NCheckbox,
   NDynamicInput,
   NDatePicker,
   NCode,
diff --git a/src/plugins/plausible.plugin.ts b/src/plugins/plausible.plugin.ts
index 56a88699..10975eac 100644
--- a/src/plugins/plausible.plugin.ts
+++ b/src/plugins/plausible.plugin.ts
@@ -1,4 +1,5 @@
 import { config } from '@/config';
+
 import Plausible from 'plausible-tracker';
 import type { App } from 'vue';
 
@@ -7,6 +8,6 @@ export const plausible = {
     const plausible = Plausible(config.plausible);
     plausible.enableAutoPageviews();
 
-    app.config.globalProperties.$plausible = plausible;
+    app.provide('plausible', plausible);
   },
 };
diff --git a/src/themes.ts b/src/themes.ts
index 73e300d0..47eef40c 100644
--- a/src/themes.ts
+++ b/src/themes.ts
@@ -6,6 +6,12 @@ export const lightThemeOverrides: GlobalThemeOverrides = {
   },
 
   Layout: { color: '#f1f5f9' },
+
+  AutoComplete: {
+    peers: {
+      InternalSelectMenu: { height: '500px' },
+    },
+  },
 };
 
 export const darkThemeOverrides: GlobalThemeOverrides = {
@@ -16,6 +22,12 @@ export const darkThemeOverrides: GlobalThemeOverrides = {
     primaryColorSuppl: '#36AD6AFF',
   },
 
+  AutoComplete: {
+    peers: {
+      InternalSelectMenu: { height: '500px', color: '#1e1e1e' },
+    },
+  },
+
   Menu: {
     itemHeight: '32px',
   },
diff --git a/src/tools/base64-string-converter/base64-string-converter.vue b/src/tools/base64-string-converter/base64-string-converter.vue
index d725117c..649f9d39 100644
--- a/src/tools/base64-string-converter/base64-string-converter.vue
+++ b/src/tools/base64-string-converter/base64-string-converter.vue
@@ -53,5 +53,3 @@ const b64Validation = useValidation({
   rules: [{ message: 'Invalid base64 string', validator: (value) => isValidBase64(value.trim()) }],
 });
 </script>
-
-<style lang="less" scoped></style>
diff --git a/src/tools/chmod-calculator/chmod-calculator.service.test.ts b/src/tools/chmod-calculator/chmod-calculator.service.test.ts
new file mode 100644
index 00000000..fafb393f
--- /dev/null
+++ b/src/tools/chmod-calculator/chmod-calculator.service.test.ts
@@ -0,0 +1,68 @@
+import { expect, describe, it } from 'vitest';
+import { computeChmodOctalRepresentation } from './chmod-calculator.service';
+
+describe('chmod-calculator', () => {
+  describe('computeChmodOctalRepresentation', () => {
+    it('get the octal representation from permissions', () => {
+      expect(
+        computeChmodOctalRepresentation({
+          permissions: {
+            owner: { read: true, write: true, execute: true },
+            group: { read: true, write: true, execute: true },
+            public: { read: true, write: true, execute: true },
+          },
+        }),
+      ).to.eql('777');
+
+      expect(
+        computeChmodOctalRepresentation({
+          permissions: {
+            owner: { read: false, write: false, execute: false },
+            group: { read: false, write: false, execute: false },
+            public: { read: false, write: false, execute: false },
+          },
+        }),
+      ).to.eql('000');
+
+      expect(
+        computeChmodOctalRepresentation({
+          permissions: {
+            owner: { read: false, write: true, execute: false },
+            group: { read: false, write: true, execute: true },
+            public: { read: true, write: false, execute: true },
+          },
+        }),
+      ).to.eql('235');
+
+      expect(
+        computeChmodOctalRepresentation({
+          permissions: {
+            owner: { read: true, write: false, execute: false },
+            group: { read: false, write: true, execute: false },
+            public: { read: false, write: false, execute: true },
+          },
+        }),
+      ).to.eql('421');
+
+      expect(
+        computeChmodOctalRepresentation({
+          permissions: {
+            owner: { read: false, write: false, execute: true },
+            group: { read: false, write: true, execute: false },
+            public: { read: true, write: false, execute: false },
+          },
+        }),
+      ).to.eql('124');
+
+      expect(
+        computeChmodOctalRepresentation({
+          permissions: {
+            owner: { read: false, write: true, execute: false },
+            group: { read: false, write: true, execute: false },
+            public: { read: false, write: true, execute: false },
+          },
+        }),
+      ).to.eql('222');
+    });
+  });
+});
diff --git a/src/tools/chmod-calculator/chmod-calculator.service.ts b/src/tools/chmod-calculator/chmod-calculator.service.ts
new file mode 100644
index 00000000..89535519
--- /dev/null
+++ b/src/tools/chmod-calculator/chmod-calculator.service.ts
@@ -0,0 +1,17 @@
+import _ from 'lodash';
+import type { GroupPermissions, Permissions } from './chmod-calculator.types';
+
+export { computeChmodOctalRepresentation };
+
+function computeChmodOctalRepresentation({ permissions }: { permissions: Permissions }): string {
+  const permissionValue = { read: 4, write: 2, execute: 1 };
+
+  const getGroupPermissionValue = (permission: GroupPermissions) =>
+    _.reduce(permission, (acc, isPermSet, key) => acc + (isPermSet ? _.get(permissionValue, key, 0) : 0), 0);
+
+  return [
+    getGroupPermissionValue(permissions.owner),
+    getGroupPermissionValue(permissions.group),
+    getGroupPermissionValue(permissions.public),
+  ].join('');
+}
diff --git a/src/tools/chmod-calculator/chmod-calculator.types.ts b/src/tools/chmod-calculator/chmod-calculator.types.ts
new file mode 100644
index 00000000..d3dc915f
--- /dev/null
+++ b/src/tools/chmod-calculator/chmod-calculator.types.ts
@@ -0,0 +1,10 @@
+export type Scope = 'read' | 'write' | 'execute';
+export type Group = 'owner' | 'group' | 'public';
+
+export type GroupPermissions = {
+  [k in Scope]: boolean;
+};
+
+export type Permissions = {
+  [k in Group]: GroupPermissions;
+};
diff --git a/src/tools/chmod-calculator/chmod-calculator.vue b/src/tools/chmod-calculator/chmod-calculator.vue
new file mode 100644
index 00000000..31f8b9fd
--- /dev/null
+++ b/src/tools/chmod-calculator/chmod-calculator.vue
@@ -0,0 +1,83 @@
+<template>
+  <div>
+    <n-table :bordered="false" :bottom-bordered="false" single-column class="permission-table">
+      <thead>
+        <tr>
+          <th class="text-center" scope="col"></th>
+          <th class="text-center" scope="col">Owner (u)</th>
+          <th class="text-center" scope="col">Group (g)</th>
+          <th class="text-center" scope="col">Public (o)</th>
+        </tr>
+      </thead>
+      <tbody>
+        <tr v-for="{ scope, title } of scopes" :key="scope">
+          <td class="line-header">{{ title }}</td>
+          <td v-for="group of groups" :key="group" class="text-center">
+            <!-- <n-switch v-model:value="permissions[group][scope]" /> -->
+            <n-checkbox v-model:checked="permissions[group][scope]" size="large" />
+          </td>
+        </tr>
+      </tbody>
+    </n-table>
+
+    <div class="octal-result">
+      {{ octal }}
+    </div>
+
+    <input-copyable :value="`chmod ${octal} path`" readonly style="margin-bottom: 5px" />
+  </div>
+</template>
+
+<script setup lang="ts">
+import { useThemeVars } from 'naive-ui';
+import { computed, ref } from 'vue';
+import { computeChmodOctalRepresentation } from './chmod-calculator.service';
+import InputCopyable from '../../components/InputCopyable.vue';
+
+import type { Group, Scope } from './chmod-calculator.types';
+
+const themeVars = useThemeVars();
+
+const scopes: { scope: Scope; title: string }[] = [
+  { scope: 'read', title: 'Read (4)' },
+  { scope: 'write', title: 'Write (2)' },
+  { scope: 'execute', title: 'Execute (1)' },
+];
+const groups: Group[] = ['owner', 'group', 'public'];
+
+const permissions = ref({
+  owner: { read: false, write: false, execute: false },
+  group: { read: false, write: false, execute: false },
+  public: { read: false, write: false, execute: false },
+});
+
+const octal = computed(() => computeChmodOctalRepresentation({ permissions: permissions.value }));
+</script>
+
+<style lang="less" scoped>
+.octal-result {
+  text-align: center;
+  font-size: 50px;
+  font-family: monospace;
+  color: v-bind('themeVars.primaryColor');
+  margin: 20px 0;
+}
+.permission-table {
+  td,
+  th {
+    padding: 15px;
+
+    @media screen and (max-width: 600px) {
+      padding: 5px;
+    }
+  }
+}
+.line-header {
+  font-weight: bold;
+  text-align: right;
+  max-width: 80px;
+}
+.text-center {
+  text-align: center;
+}
+</style>
diff --git a/src/tools/chmod-calculator/index.ts b/src/tools/chmod-calculator/index.ts
new file mode 100644
index 00000000..7d299e42
--- /dev/null
+++ b/src/tools/chmod-calculator/index.ts
@@ -0,0 +1,22 @@
+import { FileInvoice } from '@vicons/tabler';
+import { defineTool } from '../tool';
+
+export const tool = defineTool({
+  name: 'Chmod calculator',
+  path: '/chmod-calculator',
+  description: 'Compute your chmod permissions and commands with this online chmod calculator.',
+  keywords: [
+    'chmod',
+    'calculator',
+    'file',
+    'permission',
+    'files',
+    'directory',
+    'folder',
+    'recursive',
+    'generator',
+    'octal',
+  ],
+  component: () => import('./chmod-calculator.vue'),
+  icon: FileInvoice,
+});
diff --git a/src/tools/hmac-generator/hmac-generator.vue b/src/tools/hmac-generator/hmac-generator.vue
index 3c524259..9cf2c9bf 100644
--- a/src/tools/hmac-generator/hmac-generator.vue
+++ b/src/tools/hmac-generator/hmac-generator.vue
@@ -94,5 +94,3 @@ const hmac = computed(() =>
 );
 const { copy } = useCopy({ source: hmac });
 </script>
-
-<style lang="less" scoped></style>
diff --git a/src/tools/index.ts b/src/tools/index.ts
index ca4e5f98..69b81e3b 100644
--- a/src/tools/index.ts
+++ b/src/tools/index.ts
@@ -1,7 +1,5 @@
-import { LockOpen } from '@vicons/tabler';
-import type { ToolCategory } from './tool';
-
 import { tool as jwtParser } from './jwt-parser';
+import { tool as chmodCalculator } from './chmod-calculator';
 import { tool as mimeTypes } from './mime-types';
 import { tool as otpCodeGeneratorAndValidator } from './otp-code-generator-and-validator';
 import { tool as base64FileConverter } from './base64-file-converter';
@@ -36,16 +34,15 @@ import { tool as tokenGenerator } from './token-generator';
 import { tool as urlEncoder } from './url-encoder';
 import { tool as urlParser } from './url-parser';
 import { tool as uuidGenerator } from './uuid-generator';
+import type { ToolCategory } from './tools.types';
 
 export const toolsByCategory: ToolCategory[] = [
   {
     name: 'Crypto',
-    icon: LockOpen,
     components: [tokenGenerator, hashText, bcrypt, uuidGenerator, cypher, bip39, hmacGenerator],
   },
   {
     name: 'Converter',
-    icon: LockOpen,
     components: [
       dateTimeConverter,
       baseConverter,
@@ -58,7 +55,6 @@ export const toolsByCategory: ToolCategory[] = [
   },
   {
     name: 'Web',
-    icon: LockOpen,
     components: [
       urlEncoder,
       htmlEntities,
@@ -73,27 +69,22 @@ export const toolsByCategory: ToolCategory[] = [
   },
   {
     name: 'Images',
-    icon: LockOpen,
     components: [qrCodeGenerator, svgPlaceholderGenerator],
   },
   {
     name: 'Development',
-    icon: LockOpen,
-    components: [gitMemo, randomPortGenerator, crontabGenerator, jsonViewer, sqlPrettify],
+    components: [gitMemo, randomPortGenerator, crontabGenerator, jsonViewer, sqlPrettify, chmodCalculator],
   },
   {
     name: 'Math',
-    icon: LockOpen,
     components: [mathEvaluator, etaCalculator],
   },
   {
     name: 'Measurement',
-    icon: LockOpen,
     components: [chronometer],
   },
   {
     name: 'Text',
-    icon: LockOpen,
     components: [loremIpsumGenerator, textStatistics],
   },
 ];
diff --git a/src/tools/integer-base-converter/integer-base-converter.model.ts b/src/tools/integer-base-converter/integer-base-converter.model.ts
index c3ed66df..cfe15bd1 100644
--- a/src/tools/integer-base-converter/integer-base-converter.model.ts
+++ b/src/tools/integer-base-converter/integer-base-converter.model.ts
@@ -7,7 +7,7 @@ export function convertBase({ value, fromBase, toBase }: { value: string; fromBa
     .reverse()
     .reduce((carry: number, digit: string, index: number) => {
       if (!fromRange.includes(digit)) {
-        throw new Error('Invalid digit `' + digit + '` for base ' + fromBase + '.');
+        throw new Error('Invalid digit "' + digit + '" for base ' + fromBase + '.');
       }
       return (carry += fromRange.indexOf(digit) * Math.pow(fromBase, index));
     }, 0);
diff --git a/src/tools/integer-base-converter/integer-base-converter.vue b/src/tools/integer-base-converter/integer-base-converter.vue
index 04c43218..33b1deeb 100644
--- a/src/tools/integer-base-converter/integer-base-converter.vue
+++ b/src/tools/integer-base-converter/integer-base-converter.vue
@@ -4,7 +4,7 @@
       <div v-if="styleStore.isSmallScreen">
         <n-input-group>
           <n-input-group-label style="flex: 0 0 120px"> Input number: </n-input-group-label>
-          <n-input-number v-model:value="inputNumber" min="0" style="width: 100%" />
+          <n-input v-model:value="input" style="width: 100%" :status="error ? 'error' : undefined" />
         </n-input-group>
         <n-input-group>
           <n-input-group-label style="flex: 0 0 120px"> Input base: </n-input-group-label>
@@ -14,51 +14,65 @@
 
       <n-input-group v-else>
         <n-input-group-label style="flex: 0 0 120px"> Input number: </n-input-group-label>
-        <n-input-number v-model:value="inputNumber" min="0" />
+        <n-input v-model:value="input" :status="error ? 'error' : undefined" />
         <n-input-group-label style="flex: 0 0 120px"> Input base: </n-input-group-label>
         <n-input-number v-model:value="inputBase" max="64" min="2" />
       </n-input-group>
+
+      <n-alert v-if="error" style="margin-top: 25px" type="error">{{ error }}</n-alert>
       <n-divider />
 
       <n-input-group>
         <n-input-group-label style="flex: 0 0 170px"> Binary (2): </n-input-group-label>
-        <input-copyable :value="convertBase({ value: String(inputNumber), fromBase: inputBase, toBase: 2 })" readonly />
+        <input-copyable
+          :value="errorlessConvert({ value: input, fromBase: inputBase, toBase: 2 })"
+          readonly
+          placeholder="Binary version will be here..."
+        />
       </n-input-group>
 
       <n-input-group>
         <n-input-group-label style="flex: 0 0 170px"> Octal (8): </n-input-group-label>
-        <input-copyable :value="convertBase({ value: String(inputNumber), fromBase: inputBase, toBase: 8 })" readonly />
+        <input-copyable
+          :value="errorlessConvert({ value: input, fromBase: inputBase, toBase: 8 })"
+          readonly
+          placeholder="Octal version will be here..."
+        />
       </n-input-group>
 
       <n-input-group>
         <n-input-group-label style="flex: 0 0 170px"> Decimal (10): </n-input-group-label>
         <input-copyable
-          :value="convertBase({ value: String(inputNumber), fromBase: inputBase, toBase: 10 })"
+          :value="errorlessConvert({ value: input, fromBase: inputBase, toBase: 10 })"
           readonly
+          placeholder="Decimal version will be here..."
         />
       </n-input-group>
 
       <n-input-group>
         <n-input-group-label style="flex: 0 0 170px"> Hexadecimal (16): </n-input-group-label>
         <input-copyable
-          :value="convertBase({ value: String(inputNumber), fromBase: inputBase, toBase: 16 })"
+          :value="errorlessConvert({ value: input, fromBase: inputBase, toBase: 16 })"
           readonly
+          placeholder="Decimal version will be here..."
         />
       </n-input-group>
 
       <n-input-group>
         <n-input-group-label style="flex: 0 0 170px"> Base64 (64): </n-input-group-label>
         <input-copyable
-          :value="convertBase({ value: String(inputNumber), fromBase: inputBase, toBase: 64 })"
+          :value="errorlessConvert({ value: input, fromBase: inputBase, toBase: 64 })"
           readonly
+          placeholder="Base64 version will be here..."
         />
       </n-input-group>
       <n-input-group>
         <n-input-group-label style="flex: 0 0 85px"> Custom: </n-input-group-label>
         <n-input-number v-model:value="outputBase" style="flex: 0 0 86px" max="64" min="2" />
         <input-copyable
-          :value="convertBase({ value: String(inputNumber), fromBase: inputBase, toBase: outputBase })"
+          :value="errorlessConvert({ value: input, fromBase: inputBase, toBase: outputBase })"
           readonly
+          :placeholder="`Base ${outputBase} will be here...`"
         />
       </n-input-group>
     </n-card>
@@ -66,16 +80,31 @@
 </template>
 
 <script setup lang="ts">
-import { ref } from 'vue';
+import { computed, ref } from 'vue';
 import { useStyleStore } from '@/stores/style.store';
+import { getErrorMessageIfThrows } from '@/utils/error';
 import { convertBase } from './integer-base-converter.model';
 import InputCopyable from '../../components/InputCopyable.vue';
 
 const styleStore = useStyleStore();
 
-const inputNumber = ref(42);
+const input = ref('42');
 const inputBase = ref(10);
 const outputBase = ref(42);
+
+function errorlessConvert(...args: Parameters<typeof convertBase>) {
+  try {
+    return convertBase(...args);
+  } catch (err) {
+    return '';
+  }
+}
+
+const error = computed(() =>
+  getErrorMessageIfThrows(() =>
+    convertBase({ value: input.value, fromBase: inputBase.value, toBase: outputBase.value }),
+  ),
+);
 </script>
 
 <style lang="less" scoped>
diff --git a/src/tools/math-evaluator/math-evaluator.vue b/src/tools/math-evaluator/math-evaluator.vue
index 59754de6..16aa7c47 100644
--- a/src/tools/math-evaluator/math-evaluator.vue
+++ b/src/tools/math-evaluator/math-evaluator.vue
@@ -29,5 +29,3 @@ const expression = ref('');
 
 const result = computed(() => withDefaultOnError(() => evaluate(expression.value) ?? '', ''));
 </script>
-
-<style lang="less" scoped></style>
diff --git a/src/tools/mime-types/mime-types.vue b/src/tools/mime-types/mime-types.vue
index 0c7a5eb0..eb08124f 100644
--- a/src/tools/mime-types/mime-types.vue
+++ b/src/tools/mime-types/mime-types.vue
@@ -95,5 +95,3 @@ const selectedExtension = ref(undefined);
 
 const mimeTypeFound = computed(() => (selectedExtension.value ? extensionToMimeType[selectedExtension.value] : []));
 </script>
-
-<style lang="less" scoped></style>
diff --git a/src/tools/tool.ts b/src/tools/tool.ts
index b2ebf497..8289aa33 100644
--- a/src/tools/tool.ts
+++ b/src/tools/tool.ts
@@ -1,27 +1,10 @@
 import { config } from '@/config';
-import type { Component } from 'vue';
-
-export interface ITool {
-  name: string;
-  path: string;
-  description: string;
-  keywords: string[];
-  component: () => Promise<Component>;
-  icon: Component;
-  redirectFrom?: string[];
-  isNew: boolean;
-}
-
-export interface ToolCategory {
-  name: string;
-  icon: Component;
-  components: ITool[];
-}
+import type { Tool } from './tools.types';
 
 type WithOptional<T, K extends keyof T> = Omit<T, K> & Partial<Pick<T, K>>;
 
 export function defineTool(
-  tool: WithOptional<ITool, 'isNew'>,
+  tool: WithOptional<Tool, 'isNew'>,
   { newTools }: { newTools: string[] } = { newTools: config.tools.newTools },
 ) {
   const isNew = newTools.includes(tool.name);
diff --git a/src/tools/tools.store.ts b/src/tools/tools.store.ts
new file mode 100644
index 00000000..2b0826c1
--- /dev/null
+++ b/src/tools/tools.store.ts
@@ -0,0 +1,44 @@
+import { get, useStorage, type MaybeRef } from '@vueuse/core';
+import { defineStore } from 'pinia';
+import type { Ref } from 'vue';
+import { toolsWithCategory } from './index';
+import type { Tool, ToolWithCategory } from './tools.types';
+
+export const useToolStore = defineStore('tools', {
+  state: () => ({
+    favoriteToolsName: useStorage('favoriteToolsName', []) as Ref<string[]>,
+  }),
+  getters: {
+    favoriteTools(state) {
+      return state.favoriteToolsName
+        .map((favoriteName) => toolsWithCategory.find(({ name }) => name === favoriteName))
+        .filter(Boolean) as ToolWithCategory[]; // cast because .filter(Boolean) does not remove undefined from type
+    },
+
+    notFavoriteTools(state): ToolWithCategory[] {
+      return toolsWithCategory.filter((tool) => !state.favoriteToolsName.includes(tool.name));
+    },
+
+    tools(): ToolWithCategory[] {
+      return toolsWithCategory;
+    },
+
+    newTools(): ToolWithCategory[] {
+      return this.tools.filter(({ isNew }) => isNew);
+    },
+  },
+
+  actions: {
+    addToolToFavorites({ tool }: { tool: MaybeRef<Tool> }) {
+      this.favoriteToolsName.push(get(tool).name);
+    },
+
+    removeToolFromFavorites({ tool }: { tool: MaybeRef<Tool> }) {
+      this.favoriteToolsName = this.favoriteToolsName.filter((name) => get(tool).name !== name);
+    },
+
+    isToolFavorite({ tool }: { tool: MaybeRef<Tool> }) {
+      return this.favoriteToolsName.includes(get(tool).name);
+    },
+  },
+});
diff --git a/src/tools/tools.types.ts b/src/tools/tools.types.ts
new file mode 100644
index 00000000..5630a12e
--- /dev/null
+++ b/src/tools/tools.types.ts
@@ -0,0 +1,19 @@
+import type { Component } from 'vue';
+
+export type Tool = {
+  name: string;
+  path: string;
+  description: string;
+  keywords: string[];
+  component: () => Promise<Component>;
+  icon: Component;
+  redirectFrom?: string[];
+  isNew: boolean;
+};
+
+export type ToolCategory = {
+  name: string;
+  components: Tool[];
+};
+
+export type ToolWithCategory = Tool & { category: string };
diff --git a/src/utils/error.test.ts b/src/utils/error.test.ts
new file mode 100644
index 00000000..02728049
--- /dev/null
+++ b/src/utils/error.test.ts
@@ -0,0 +1,29 @@
+import { describe, expect, it } from 'vitest';
+import { getErrorMessageIfThrows } from './error';
+
+describe('error util', () => {
+  describe('getErrorMessageIfThrows', () => {
+    it('get an error message if the callback throws, undefined instead', () => {
+      expect(
+        getErrorMessageIfThrows(() => {
+          throw 'message';
+        }),
+      ).to.equal('message');
+
+      expect(
+        getErrorMessageIfThrows(() => {
+          throw new Error('message');
+        }),
+      ).to.equal('message');
+
+      expect(
+        getErrorMessageIfThrows(() => {
+          throw { message: 'message' };
+        }),
+      ).to.equal('message');
+
+      // eslint-disable-next-line @typescript-eslint/no-empty-function
+      expect(getErrorMessageIfThrows(() => {})).to.equal(undefined);
+    });
+  });
+});
diff --git a/src/utils/error.ts b/src/utils/error.ts
new file mode 100644
index 00000000..681db912
--- /dev/null
+++ b/src/utils/error.ts
@@ -0,0 +1,24 @@
+import _ from 'lodash';
+
+export { getErrorMessageIfThrows };
+
+function getErrorMessageIfThrows(cb: () => unknown) {
+  try {
+    cb();
+    return undefined;
+  } catch (err) {
+    if (_.isString(err)) {
+      return err;
+    }
+
+    if (_.isError(err)) {
+      return err.message;
+    }
+
+    if (_.isObject(err) && _.has(err, 'message')) {
+      return (err as { message: string }).message;
+    }
+
+    return 'An error as occurred.';
+  }
+}