diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7f797374..5fe7cd86 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -25,7 +25,7 @@ import type {ToolConfig} from '@/types/ToolConfig'
 import Tool from '~/components/Tool.vue'
 
 @Component
-export default class UuidGenerator extends Tool {
+export default class MyComponent extends Tool {
   config(): ToolConfig {
     return {
       title: 'My component',
diff --git a/package-lock.json b/package-lock.json
index ca6bcc01..59cc8358 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4505,6 +4505,24 @@
         "file-uri-to-path": "1.0.0"
       }
     },
+    "bip39": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/bip39/-/bip39-3.0.3.tgz",
+      "integrity": "sha512-P0dKrz4g0V0BjXfx7d9QNkJ/Txcz/k+hM9TnjqjUaXtuOfAvxXSw2rJw8DX0e3ZPwnK/IgDxoRqf0bvoVCqbMg==",
+      "requires": {
+        "@types/node": "11.11.6",
+        "create-hash": "^1.1.0",
+        "pbkdf2": "^3.0.9",
+        "randombytes": "^2.0.1"
+      },
+      "dependencies": {
+        "@types/node": {
+          "version": "11.11.6",
+          "resolved": "https://registry.npmjs.org/@types/node/-/node-11.11.6.tgz",
+          "integrity": "sha512-Exw4yUWMBXM3X+8oqzJNRqZSwUAaS4+7NdvHqQuFi/d+synz++xmX3QIf+BFqneW8N31R8Ky+sikfZUXq07ggQ=="
+        }
+      }
+    },
     "bluebird": {
       "version": "3.7.2",
       "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
diff --git a/package.json b/package.json
index 3633457e..86e39939 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "@nuxtjs/axios": "^5.13.1",
     "@nuxtjs/pwa": "^3.0.2",
     "@nuxtjs/toast": "^3.3.1",
+    "bip39": "^3.0.3",
     "core-js": "^3.6.5",
     "crypto-js": "^4.0.0",
     "nuxt": "^2.14.12",
diff --git a/pages/tools/crypto/bip39-generator.vue b/pages/tools/crypto/bip39-generator.vue
new file mode 100644
index 00000000..337dc0ec
--- /dev/null
+++ b/pages/tools/crypto/bip39-generator.vue
@@ -0,0 +1,110 @@
+<template>
+  <ToolWrapper :config="config()">
+    <v-select
+      v-model="language"
+      outlined
+      label="Language"
+      :items="languageList"
+      @change="languageChanged"
+    />
+    <v-text-field
+      ref="entropy"
+      v-model="entropy"
+      outlined
+      label="Entropy"
+      append-icon="mdi-content-copy"
+      :rules="rules.entropy"
+      @click:append="copy(entropy)"
+    />
+    <v-text-field
+      ref="passphrase"
+      v-model="passphrase"
+      outlined
+      label="Passphrase"
+      append-icon="mdi-content-copy"
+      :rules="rules.passphrase"
+      @click:append="copy(passphrase)"
+    />
+    <div class="text-center">
+      <v-btn @click="refresh">
+        refresh
+      </v-btn>
+    </div>
+  </ToolWrapper>
+</template>
+
+<script lang="ts">
+import * as bip39 from 'bip39'
+import {shuffle} from '@/utils/string'
+import {Component, Ref} from 'nuxt-property-decorator'
+import {CopyableMixin} from '@/mixins/copyable.mixin'
+import Tool from '@/components/Tool.vue'
+import {ToolConfig} from '@/types/ToolConfig'
+import type {VForm} from '~/types/VForm'
+
+const getRandomBuffer = () => Buffer.from(shuffle('0123456789abcdef'.repeat(16)).substring(0, 32), 'hex')
+
+@Component({
+  mixins: [CopyableMixin]
+})
+export default class Bip39Generator extends Tool {
+  config(): ToolConfig {
+    return {
+      title: 'BIP39 passphrase generator',
+      description: 'Lorem ipsum dolor sit amet, consectetur adipisicing elit. Delectus distinctio dolor dolorum eaque eligendi, facilis impedit laboriosam odit placeat.',
+      icon: 'mdi-message-text-lock-outline',
+      keywords: ['BIP39', 'passphrase', 'generator']
+    }
+  }
+
+  @Ref() readonly entropyRef!: VForm
+  @Ref() readonly passphraseRef!: VForm
+  buffer = getRandomBuffer()
+  language: string = 'english'
+  languageList = Object
+    .keys(bip39.wordlists)
+    .filter(k => !k.match(/[A-Z]{2}/))
+    .map(k => ({
+      text: k.split('_').map(k => k.charAt(0).toUpperCase() + k.slice(1)).join(' '),
+      value: k
+    }))
+
+  rules = {
+    passphrase: [(v: string | undefined) => (!!v && bip39.validateMnemonic(v)) || 'Invalid mnemonic.'],
+    entropy: [(v: string | undefined) => (!!v && !!v.match(/[0-9a-fA-F]{32}/)) || 'Invalid entropy.']
+  }
+
+  get entropy() {
+    return this.buffer.toString('hex')
+  }
+
+  set entropy(value) {
+    if (this.entropyRef.validate()) {
+      this.buffer = Buffer.from(value, 'hex')
+    }
+  }
+
+  get passphrase() {
+    return bip39.entropyToMnemonic(this.buffer)
+  }
+
+  set passphrase(value) {
+    if (this.passphraseRef.validate()) {
+      this.buffer = Buffer.from(bip39.mnemonicToEntropy(value), 'hex')
+    }
+  }
+
+  refresh() {
+    this.buffer = getRandomBuffer()
+  }
+
+  languageChanged() {
+    bip39.setDefaultWordlist(this.language)
+    this.passphrase = bip39.entropyToMnemonic(this.buffer)
+  }
+}
+
+</script>
+
+<style scoped>
+</style>
diff --git a/types/VForm.ts b/types/VForm.ts
new file mode 100644
index 00000000..ead75e5b
--- /dev/null
+++ b/types/VForm.ts
@@ -0,0 +1,2 @@
+
+export type VForm = Vue & { validate: () => boolean }