diff --git a/components.d.ts b/components.d.ts
index f2c3146f..e42a8dda 100644
--- a/components.d.ts
+++ b/components.d.ts
@@ -11,6 +11,7 @@ declare module '@vue/runtime-core' {
   export interface GlobalComponents {
     '404.page': typeof import('./src/pages/404.page.vue')['default']
     About: typeof import('./src/pages/About.vue')['default']
+    ApiTester: typeof import('./src/tools/api-tester/api-tester.vue')['default']
     App: typeof import('./src/App.vue')['default']
     AsciiTextDrawer: typeof import('./src/tools/ascii-text-drawer/ascii-text-drawer.vue')['default']
     'Base.layout': typeof import('./src/layouts/base.layout.vue')['default']
@@ -127,10 +128,12 @@ declare module '@vue/runtime-core' {
     MetaTagGenerator: typeof import('./src/tools/meta-tag-generator/meta-tag-generator.vue')['default']
     MimeTypes: typeof import('./src/tools/mime-types/mime-types.vue')['default']
     NavbarButtons: typeof import('./src/components/NavbarButtons.vue')['default']
+    NCheckbox: typeof import('naive-ui')['NCheckbox']
     NCode: typeof import('naive-ui')['NCode']
     NCollapseTransition: typeof import('naive-ui')['NCollapseTransition']
     NConfigProvider: typeof import('naive-ui')['NConfigProvider']
     NDivider: typeof import('naive-ui')['NDivider']
+    NDynamicInput: typeof import('naive-ui')['NDynamicInput']
     NEllipsis: typeof import('naive-ui')['NEllipsis']
     NFormItem: typeof import('naive-ui')['NFormItem']
     NGi: typeof import('naive-ui')['NGi']
@@ -138,6 +141,7 @@ declare module '@vue/runtime-core' {
     NH1: typeof import('naive-ui')['NH1']
     NH3: typeof import('naive-ui')['NH3']
     NIcon: typeof import('naive-ui')['NIcon']
+    NInput: typeof import('naive-ui')['NInput']
     NInputNumber: typeof import('naive-ui')['NInputNumber']
     NLabel: typeof import('naive-ui')['NLabel']
     NLayout: typeof import('naive-ui')['NLayout']
diff --git a/src/components/TextareaCopyable.vue b/src/components/TextareaCopyable.vue
index 8b0aae61..1bf3b5ff 100644
--- a/src/components/TextareaCopyable.vue
+++ b/src/components/TextareaCopyable.vue
@@ -16,6 +16,7 @@ const props = withDefaults(
     language?: string
     copyPlacement?: 'top-right' | 'bottom-right' | 'outside' | 'none'
     copyMessage?: string
+    wordWrap?: boolean
   }>(),
   {
     followHeightOf: null,
@@ -47,7 +48,7 @@ const tooltipText = computed(() => isJustCopied.value ? 'Copied!' : copyMessage.
         :style="height ? `min-height: ${height - 40 /* card padding */ + 10 /* negative margin compensation */}px` : ''"
       >
         <n-config-provider :hljs="hljs">
-          <n-code :code="value" :language="language" :trim="false" data-test-id="area-content" />
+          <n-code :code="value" :language="language" :word-wrap="wordWrap" :trim="false" data-test-id="area-content" />
         </n-config-provider>
       </n-scrollbar>
       <div absolute right-10px top-10px>
diff --git a/src/composable/queryParams.ts b/src/composable/queryParams.ts
index 9699abbc..7cc8cc0d 100644
--- a/src/composable/queryParams.ts
+++ b/src/composable/queryParams.ts
@@ -1,7 +1,8 @@
 import { useRouteQuery } from '@vueuse/router';
 import { computed } from 'vue';
+import { useStorage } from '@vueuse/core';
 
-export { useQueryParam };
+export { useQueryParam, useQueryParamOrStorage };
 
 const transformers = {
   number: {
@@ -16,6 +17,12 @@ const transformers = {
     fromQuery: (value: string) => value.toLowerCase() === 'true',
     toQuery: (value: boolean) => (value ? 'true' : 'false'),
   },
+  object: {
+    fromQuery: (value: string) => {
+      return JSON.parse(value);
+    },
+    toQuery: (value: object) => JSON.stringify(value),
+  },
 };
 
 function useQueryParam<T>({ name, defaultValue }: { name: string; defaultValue: T }) {
@@ -33,3 +40,27 @@ function useQueryParam<T>({ name, defaultValue }: { name: string; defaultValue:
     },
   });
 }
+
+function useQueryParamOrStorage<T>({ name, storageName, defaultValue }: { name: string; storageName: string; defaultValue: T }) {
+  const type = typeof defaultValue;
+  const transformer = transformers[type as keyof typeof transformers] ?? transformers.string;
+
+  const storageRef = useStorage(storageName, defaultValue);
+  const proxyDefaultValue = transformer.toQuery(defaultValue as never);
+  const proxy = useRouteQuery(name, proxyDefaultValue);
+
+  const r = ref(defaultValue);
+
+  watch(r,
+    (value) => {
+      proxy.value = transformer.toQuery(value as never);
+      storageRef.value = value as never;
+    },
+    { deep: true });
+
+  r.value = (proxy.value && proxy.value !== proxyDefaultValue
+    ? transformer.fromQuery(proxy.value) as unknown as T
+    : storageRef.value as T) as never;
+
+  return r;
+}
diff --git a/src/tools/api-tester/api-tester.vue b/src/tools/api-tester/api-tester.vue
new file mode 100644
index 00000000..f96fee11
--- /dev/null
+++ b/src/tools/api-tester/api-tester.vue
@@ -0,0 +1,155 @@
+<script setup lang="ts">
+import { useQueryParamOrStorage } from '@/composable/queryParams';
+import TextareaCopyable from '@/components/TextareaCopyable.vue';
+
+interface KeyValuePair {
+  key: string
+  value?: string
+}
+const baseUrl = useQueryParamOrStorage({ name: 'url', storageName: 'api-tester:url', defaultValue: '' });
+const method = useQueryParamOrStorage({ name: 'method', storageName: 'api-tester:m', defaultValue: 'POST' });
+const queryParams = useQueryParamOrStorage<KeyValuePair[]>({ name: 'params', storageName: 'api-tester:params', defaultValue: [] });
+const headers = useQueryParamOrStorage<KeyValuePair[]>({ name: 'headers', storageName: 'api-tester:headers', defaultValue: [] });
+const contentType = useQueryParamOrStorage({ name: 'ct', storageName: 'api-tester:ct', defaultValue: 'application/json' });
+const body = useQueryParamOrStorage({ name: 'body', storageName: 'api-tester:body', defaultValue: '' });
+const noCORS = ref(false);
+const apiCallResult = ref();
+
+const inprogress = ref(false);
+async function callAPI() {
+  const url = new URL(baseUrl.value);
+  for (const kv of queryParams.value) {
+    if (!kv.key) {
+      continue;
+    }
+    url.searchParams.append(kv.key, kv.value || '');
+  }
+  const queryHeaders = [] as [string, string][];
+  for (const kv of headers.value) {
+    if (!kv.key) {
+      continue;
+    }
+    queryHeaders.push([kv.key, kv.value || '']);
+  }
+  queryHeaders.push(['Content-Type', contentType.value || '']);
+
+  try {
+    const response = await fetch(url, {
+      method: method.value,
+      headers: queryHeaders,
+      body: (method.value === 'GET' || method.value === 'HEAD') ? null : body.value,
+      mode: noCORS.value ? 'no-cors' : 'cors',
+    });
+
+    let responseText = await response.text();
+    try {
+      responseText = JSON.stringify(JSON.parse(responseText), null, 2);
+    }
+    catch (_) {
+    }
+    apiCallResult.value = {
+      code: response.status,
+      error: '',
+      result: responseText,
+    };
+  }
+  catch (err: any) {
+    apiCallResult.value = {
+      code: -1,
+      error: err.toString(),
+      result: null,
+    };
+  }
+}
+
+function emptyKeyPair() {
+  return {
+    key: '',
+    value: '',
+  };
+}
+</script>
+
+<template>
+  <div>
+    <c-card title="API Calling">
+      <c-input-text
+        v-model:value="baseUrl"
+        label="Base API Url"
+        placeholder="Base API Url"
+        mb-2
+      />
+
+      <c-select
+        v-model:value="method"
+        label="HTTP Method:"
+        :options="['GET', 'POST', 'PUT', 'DELETE', 'PATCH']"
+        mb-2
+      />
+
+      <c-card title="Headers" mb-2>
+        <n-dynamic-input v-model:value="headers" :on-create="emptyKeyPair">
+          <template #create-button-default>
+            Add a new HTTP Header
+          </template>
+          <template #default="{ value }">
+            <div v-if="value" w-100 flex justify-center gap-2>
+              <c-input-text v-model:value="value.key" placeholder="Header Name" type="text" />
+              <c-input-text v-model:value="value.value" placeholder="Value" type="text" />
+            </div>
+          </template>
+        </n-dynamic-input>
+        <c-select
+          v-model:value="contentType"
+          label="Content-Type:"
+          :options="['application/json', 'text/plain']"
+          mt-2
+        />
+      </c-card>
+
+      <c-card title="Query Parameters" mb-2>
+        <n-dynamic-input v-model:value="queryParams" :on-create="emptyKeyPair">
+          <template #create-button-default>
+            Add a new Query Parameter
+          </template>
+          <template #default="{ value }">
+            <div v-if="value" w-100 flex justify-center gap-2>
+              <c-input-text v-model:value="value.key" placeholder="Param Name" type="text" />
+              <c-input-text v-model:value="value.value" placeholder="Value" type="text" />
+            </div>
+          </template>
+        </n-dynamic-input>
+      </c-card>
+      <c-input-text
+        v-if="method !== 'GET' && method !== 'HEAD'"
+        v-model:value="body"
+        label="Body"
+        placeholder="HTTP Query body"
+        multiline
+        monospace
+        mb-2
+      />
+
+      <n-checkbox v-model:checked="noCORS">
+        No CORS
+      </n-checkbox>
+
+      <div mt-5 flex justify-center>
+        <c-button secondary @click="callAPI">
+          Call API
+        </c-button>
+      </div>
+    </c-card>
+    <n-spin
+      v-if="inprogress"
+      size="small"
+    />
+    <c-alert v-if="!inprogress && apiCallResult && apiCallResult.code !== 200" type="error" mt-12 title="Error while calling API">
+      <p><strong>Status code = {{ apiCallResult.code }}</strong></p>
+      <TextareaCopyable :value="apiCallResult.error" copy-placement="none" />
+    </c-alert>
+    <c-card v-if="!inprogress && apiCallResult && apiCallResult.code === 200" mt-12 title="API Call result">
+      <TextareaCopyable :value="apiCallResult.result" word-wrap />
+    </c-card>
+  </div>
+</template>
diff --git a/src/tools/api-tester/index.ts b/src/tools/api-tester/index.ts
new file mode 100644
index 00000000..5ea35536
--- /dev/null
+++ b/src/tools/api-tester/index.ts
@@ -0,0 +1,12 @@
+import { World } from '@vicons/tabler';
+import { defineTool } from '../tool';
+
+export const tool = defineTool({
+  name: 'API Tester',
+  path: '/api-tester',
+  description: 'HTTP API Tester',
+  keywords: ['api', 'http', 'call', 'tester'],
+  component: () => import('./api-tester.vue'),
+  icon: World,
+  createdAt: new Date('2024-05-11'),
+});
diff --git a/src/tools/index.ts b/src/tools/index.ts
index aa861c93..f8e5c40c 100644
--- a/src/tools/index.ts
+++ b/src/tools/index.ts
@@ -6,6 +6,7 @@ import { tool as asciiTextDrawer } from './ascii-text-drawer';
 
 import { tool as textToUnicode } from './text-to-unicode';
 import { tool as safelinkDecoder } from './safelink-decoder';
+import { tool as apiTester } from './api-tester';
 import { tool as pdfSignatureChecker } from './pdf-signature-checker';
 import { tool as numeronymGenerator } from './numeronym-generator';
 import { tool as macAddressGenerator } from './mac-address-generator';
@@ -128,6 +129,7 @@ export const toolsByCategory: ToolCategory[] = [
       httpStatusCodes,
       jsonDiff,
       safelinkDecoder,
+      apiTester,
     ],
   },
   {