diff --git a/package-lock.json b/package-lock.json
index e8bd93ce..01108791 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,6 +8,7 @@
       "name": "it-tools",
       "version": "0.0.0",
       "dependencies": {
+        "@it-tools/bip39": "^0.0.4",
         "@vicons/material": "^0.12.0",
         "@vicons/tabler": "^0.12.0",
         "@vueuse/core": "^8.2.1",
@@ -686,6 +687,18 @@
         "node": ">=8"
       }
     },
+    "node_modules/@it-tools/bip39": {
+      "version": "0.0.4",
+      "resolved": "https://registry.npmjs.org/@it-tools/bip39/-/bip39-0.0.4.tgz",
+      "integrity": "sha512-0PWO7VKi6VALiFcm8z2WgxzSZ5wAko0OctBZ0I5+jjtSIXm3t1d54yrrHfgFOZDTyMpCXi638oLpzqexcfRtbA==",
+      "dependencies": {
+        "js-sha256": "^0.9.0",
+        "nanoid": "^3.3.2"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/CorentinTh"
+      }
+    },
     "node_modules/@jridgewell/resolve-uri": {
       "version": "3.0.5",
       "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.0.5.tgz",
@@ -4961,6 +4974,11 @@
         "@sideway/pinpoint": "^2.0.0"
       }
     },
+    "node_modules/js-sha256": {
+      "version": "0.9.0",
+      "resolved": "https://registry.npmjs.org/js-sha256/-/js-sha256-0.9.0.tgz",
+      "integrity": "sha512-sga3MHh9sgQN2+pJ9VYZ+1LPwXOxuBJBA5nrR5/ofPfuiJBE2hnjsaN8se8JznOmGLN2p49Pe5U/ttafcs/apA=="
+    },
     "node_modules/js-stringify": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/js-stringify/-/js-stringify-1.0.2.tgz",
@@ -8416,6 +8434,15 @@
       "integrity": "sha512-ZXRY4jNvVgSVQ8DL3LTcakaAtXwTVUxE81hslsyD2AtoXW/wVob10HkOJ1X/pAlcI7D+2YoZKg5do8G/w6RYgA==",
       "dev": true
     },
+    "@it-tools/bip39": {
+      "version": "0.0.4",
+      "resolved": "https://registry.npmjs.org/@it-tools/bip39/-/bip39-0.0.4.tgz",
+      "integrity": "sha512-0PWO7VKi6VALiFcm8z2WgxzSZ5wAko0OctBZ0I5+jjtSIXm3t1d54yrrHfgFOZDTyMpCXi638oLpzqexcfRtbA==",
+      "requires": {
+        "js-sha256": "^0.9.0",
+        "nanoid": "^3.3.2"
+      }
+    },
     "@jridgewell/resolve-uri": {
       "version": "3.0.5",
       "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.0.5.tgz",
@@ -11516,6 +11543,11 @@
         "@sideway/pinpoint": "^2.0.0"
       }
     },
+    "js-sha256": {
+      "version": "0.9.0",
+      "resolved": "https://registry.npmjs.org/js-sha256/-/js-sha256-0.9.0.tgz",
+      "integrity": "sha512-sga3MHh9sgQN2+pJ9VYZ+1LPwXOxuBJBA5nrR5/ofPfuiJBE2hnjsaN8se8JznOmGLN2p49Pe5U/ttafcs/apA=="
+    },
     "js-stringify": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/js-stringify/-/js-stringify-1.0.2.tgz",
diff --git a/package.json b/package.json
index 06c90490..0bfc4b76 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
     "lint": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs,.ts,.tsx,.cts,.mts --fix --ignore-path .gitignore"
   },
   "dependencies": {
+    "@it-tools/bip39": "^0.0.4",
     "@vicons/material": "^0.12.0",
     "@vicons/tabler": "^0.12.0",
     "@vueuse/core": "^8.2.1",
diff --git a/src/composable/validation.ts b/src/composable/validation.ts
new file mode 100644
index 00000000..09b1fce4
--- /dev/null
+++ b/src/composable/validation.ts
@@ -0,0 +1,27 @@
+import { reactive, watch, type Ref } from 'vue';
+
+type UseValidationRule<T> = {
+  validator: (value: T) => boolean
+  message: string
+}
+
+export function useValidation<T>({ source, rules }: { source: Ref<T>; rules: UseValidationRule<T>[] }) {
+  const state = reactive<{
+    message: string,
+    status: undefined | 'error'
+  }>({
+    message: '',
+    status: undefined
+  })
+
+  watch([source], () => {
+    for(const rule of rules) {
+      if(!rule.validator(source.value)){
+        state.message = rule.message
+        state.status = 'error'
+      }
+    }
+  })
+
+  return state;
+}
diff --git a/src/plugins/naive.plugin.ts b/src/plugins/naive.plugin.ts
index b04df564..86a46174 100644
--- a/src/plugins/naive.plugin.ts
+++ b/src/plugins/naive.plugin.ts
@@ -42,9 +42,13 @@ import {
   NH3,
   NEllipsis,
   NTag,
+  NInputGroup,
+  NInputGroupLabel,
 } from 'naive-ui';
 
 const components = [
+  NInputGroup,
+  NInputGroupLabel,
   NTag,
   NResult,
   NEllipsis,
diff --git a/src/tools/bip39-generator/bip39-generator.vue b/src/tools/bip39-generator/bip39-generator.vue
index 2a363081..a0b564d5 100644
--- a/src/tools/bip39-generator/bip39-generator.vue
+++ b/src/tools/bip39-generator/bip39-generator.vue
@@ -1,27 +1,45 @@
 <template>
     <div>
         <n-card>
-            <n-space item-style="flex: 1 1 0">
-                <n-form-item label="Language:">
-                    <n-select v-model:value="language" :options="languages" />
-                </n-form-item>
-                <n-form-item label="Entropy (seed):">
-                    <n-input v-model:value="entropy" placeholder="Your string..." />
-                </n-form-item>
-            </n-space>
-            <n-form-item label="Passphrase (mnemonic):">
-                <n-input
-                    style="text-align: center;"
-                    :value="passphrase"
-                    type="textarea"
-                    placeholder="Your string hash"
-                    :autosize="{ minRows: 1 }"
-                    readonly
-                    autocomplete="off"
-                    autocorrect="off"
-                    autocapitalize="off"
-                    spellcheck="false"
-                />
+            <n-grid cols="3" x-gap="12">
+                <n-gi span="1">
+                    <n-form-item label="Language:">
+                        <n-select v-model:value="language"
+                            :options="Object.keys(languages).map(label => ({ label, value: label }))" />
+                    </n-form-item>
+                </n-gi>
+                <n-gi span="2">
+                    <n-form-item label="Entropy (seed):" :feedback="entropyValidation.message"
+                        :validation-status="entropyValidation.status">
+                        <n-input-group>
+                            <n-input v-model:value="entropy" placeholder="Your string..." />
+                            <n-button @click="refreshEntropy">
+                                <n-icon size="22">
+                                    <Refresh />
+                                </n-icon>
+                            </n-button>
+                            <n-button @click="copyEntropy">
+                                <n-icon size="22">
+                                    <Copy />
+                                </n-icon>
+                            </n-button>
+                        </n-input-group>
+
+                    </n-form-item>
+                </n-gi>
+            </n-grid>
+            <br>
+            <n-form-item label="Passphrase (mnemonic):" :feedback="mnemonicValidation.message"
+                :validation-status="mnemonicValidation.status">
+                <n-input-group>
+                    <n-input style="text-align: center; flex: 1;" v-model:value="passphrase"
+                        placeholder="Your mnemonic..." autocomplete="off" autocorrect="off" autocapitalize="off"
+                        spellcheck="false" />
+
+                    <n-button @click="copyPassphrase">
+                        <n-icon size="22" :component="Copy" />
+                    </n-button>
+                </n-input-group>
             </n-form-item>
         </n-card>
     </div>
@@ -30,16 +48,99 @@
 <script setup lang="ts">
 import { useCopy } from '@/composable/copy';
 import { ref, computed } from 'vue'
-import { entropyToMnemonic } from 'bip39'
+import {
+    entropyToMnemonic,
+    englishWordList,
+    chineseSimplifiedWordList,
+    chineseTraditionalWordList,
+    czechWordList,
+    frenchWordList,
+    italianWordList,
+    japaneseWordList,
+    koreanWordList,
+    portugueseWordList,
+    spanishWordList,
+    generateEntropy,
+    mnemonicToEntropy
+} from '@it-tools/bip39'
+import { Copy, Refresh } from '@vicons/tabler'
+import { useValidation } from '@/composable/validation';
 
-const entropy = ref('1d60683972011cb97322ed6ae96225f3')
-const language = ref('English')
-const languages = ref(['English'])
-const passphrase = computed(() => {
-    // setDefaultWordlist(language.value)
-    return entropyToMnemonic(Buffer.from(entropy.value, "utf-8"))
+
+const languages = {
+    'English': englishWordList,
+    'Chinese simplified': chineseSimplifiedWordList,
+    'Chinese traditional': chineseTraditionalWordList,
+    'Czech': czechWordList,
+    'French': frenchWordList,
+    'Italian': italianWordList,
+    'Japanese': japaneseWordList,
+    'Korean': koreanWordList,
+    'Portuguese': portugueseWordList,
+    'Spanish': spanishWordList
+}
+
+const entropy = ref(generateEntropy())
+const passphraseInput = ref('')
+
+const language = ref<keyof typeof languages>('English')
+const passphrase = computed({
+    get() {
+        try {
+            return entropyToMnemonic(entropy.value, languages[language.value])
+        } catch (_) {
+            return passphraseInput.value
+        }
+    },
+    set(value: string) {
+        passphraseInput.value = value
+
+        try {
+            entropy.value = mnemonicToEntropy(value, languages[language.value])
+        } catch (_) {
+            entropy.value = ''
+        }
+    }
 })
 
+const entropyValidation = useValidation({
+    source: entropy,
+    rules: [
+        {
+            validator: (value) => value === '' || (value.length <= 32 && value.length >= 16 && value.length % 4 === 0),
+            message: 'Entropy length should be >= 16, <= 32 and be a multiple of 4'
+        },
+        {
+            validator: (value) => /^[a-fA-f0-9]?$/.test(value),
+            message: 'Entropy should an hexadecimal number'
+        }
+    ]
+})
+
+const mnemonicValidation = useValidation({
+    source: passphrase,
+    rules: [
+        {
+            validator: (value) => {
+                try {
+                    mnemonicToEntropy(value)
+                    return true
+                } catch (_) {
+                    return false
+                }
+            },
+            message: 'Invalid mnemonic'
+        }
+    ]
+})
+
+
+function refreshEntropy() {
+    entropy.value = generateEntropy()
+}
+
+const { copy: copyEntropy } = useCopy({ source: entropy, text: 'Entropy copied to the clipboard' })
+const { copy: copyPassphrase } = useCopy({ source: passphrase, text: 'Passphrase copied to the clipboard' })
 
 </script>