Mira Translator - Web Translation by David Bai

🌐 Immersive Web Translation · 🎬 YouTube Dual Subtitles · 🤖 AI Translation · 📚 Text Selection & Vocabulary

Mira Translator is an open-source browser extension focused on web translation and language learning, with a strong focus on privacy and security. It supports bilingual web translation, YouTube dual subtitles, AI translation, text selection translation, vocabulary learning, and per-site translation settings.

🆓 Free Translation

Works right after installation — no account or API key required.

Immersive bilingual web translation

YouTube dual subtitles

Built-in Google and Bing translation

Support for desktop browsers and selected Android browsers

🤖 AI Translation

Use your own API key to connect to a variety of AI and translation services:

GPT · Gemini · Claude · DeepL · Groq · SiliconFlow · Ollama, and more

Custom API URLs are also supported, allowing you to connect to other compatible AI services.

AI translation supports contextual understanding and can use surrounding text to produce more natural translations.

Your API key is stored locally. AI translation requests are sent directly to the service you choose and never routed through Mira's servers.

🎯 Per-Site Translation Settings

Each website can have its own translation settings:

Enable or disable automatic translation

Enable or disable text selection translation

Choose which areas of the page to translate

With the smart selector, you can select any area of a webpage for translation.

Site settings are remembered automatically and restored the next time you visit.

Works with complex websites such as Facebook, Instagram, X, Reddit, and GitHub.

⌨ Keyboard Shortcut Translation

Hover over a paragraph or word and use a keyboard shortcut to translate it instantly — no need to select or copy the text.

🎬 YouTube Dual Subtitles

Simply turn on the video's built-in CC subtitles to get started.

Dual subtitles

Real-time subtitle preview

Subtitle download

Look up and save words directly from subtitles

📚 Text Selection & Vocabulary

Double-click a word to look it up and save it to your vocabulary list.

Saved words can be automatically highlighted on webpages and in YouTube subtitles, making it easy to review vocabulary while reading and watching.

☁ Cross-Device Sync

Supports WebDAV, Google Drive, and OneDrive.

Sync your vocabulary and related settings between your computer and supported browsers on Android, including Firefox and Edge.

🔒 Privacy & Open Source

Mira Translator is open source.

Your API keys are stored locally, and AI translation requests are sent directly to your selected service without passing through Mira's servers.

⚡ Lightweight & Fast

Built with native JavaScript and designed to provide a lightweight, fast web translation experience.

Open source · Lightweight · Flexible · Customizable

Only 300KB+.

Source code: https://github.com/os9sur/MiraTranslator