Translate papers, web pages,
and YouTube subtitles.

Free AI Chrome extension for papers, web pages, and real-time YouTube subtitles.
Formula-safe. Works natively with Claude and any OpenAI-compatible API — or your own local LLM.

Install on Chrome View on GitHub
Translator translating a paper while preserving math formulas
Formula-safeLaTeX, MathJax, and code blocks stay intact.
Free + BYO AI keyNative Claude or any OpenAI-compatible endpoint.
Local / intranet LLMKeep data inside your network.
Papers · Web · VideoDocuments, any web page, and real-time YouTube captions.

Built for everything you read and watch

Formula-safe papers, full web pages, and real-time YouTube captions — all in your language.

Formula-safe translationLaTeX, MathJax, and KaTeX expressions are detected, protected, and preserved intact.
Privacy you controlRequests go only to your configured endpoint. Use a local LLM for full offline operation.
Beautiful bilingual layoutSide-by-side or inline translations that match the paper's original typography and structure.
Custom prompt controlFine-tune translations with your own system prompt for tone, formality, and domain terminology.
Hover & selection modesHover a paragraph + hotkey for instant inline translation, or select text for a popup.
Claude & OpenAI-compatible APIsNative Anthropic Claude (auto-detected) plus any OpenAI-compatible endpoint — OpenAI, Gemini, DeepSeek, OpenRouter, Ollama, LM Studio.

See formulas stay perfect

Original paper on the left, AI translation on the right — every equation preserved.

Side-by-side comparison showing math formulas preserved during translation
Full-page translationTranslate an entire paper with one click. Progress bar tracks every paragraph.
Any web pageTranslate news, blogs, docs, and wikis inline — original layout and styling preserved.
Float ball & hotkeysDraggable quick-access button plus configurable keyboard shortcuts for every action.
New · YouTube

Translate YouTube subtitles in real time

Watch any video in your language. Translator adds a bilingual caption line — original on top, your language below — as the video plays.

  • Bilingual captions. Keep the original and read the translation together, or hide the original.
  • Real-time, ahead of the playhead. The whole track translates as you watch, so lines are ready before you reach them.
  • Sentence-level and context-aware. Full sentences, not word-by-word fragments — natural reading that beats auto-translate.
  • Any language, your model. Translate any caption track with OpenAI, Claude, DeepSeek, or a private local LLM.
  • Make it yours. Drag, resize, and restyle the subtitle box — font color, background, and opacity.
Add to Chrome — free How it works

Translation in action

Academic paper with bilingual translation showing preserved formulas
Bilingual inline translation with formulas preserved.
Extension translating a web page in real time
Real-time translation on any web page.

Start in minutes

InstallGet the Chrome extension from the Web Store — one click.
ConfigureAdd your AI key and endpoint. Works with any OpenAI-compatible API.
TranslateOpen any paper and translate — formulas stay intact.

FAQ

Is it free?Yes. The extension is free; you only pay your model provider by using your own API key.
Does it leak my data?No. Requests go only to the endpoint you configure. Use a local or intranet LLM for full LAN-only privacy.
Does it handle formulas?Yes. LaTeX and MathJax notation is preserved and rendered cleanly during translation.
Which AI providers are supported?The native Anthropic Claude API (auto-detected via /v1/messages) plus any OpenAI-compatible endpoint — OpenAI, Gemini, DeepSeek, OpenRouter, and local LLMs (Ollama, LM Studio).
Does it work with local LLMs?Yes. Point the endpoint to a local server (Ollama, LM Studio, etc.) and your data never leaves your machine.
What browsers are supported?Translator works on Chrome and all Chromium-based browsers (Edge, Brave, Arc, etc.).
Can I customize the translation style?Yes. You can edit the system prompt to control tone, formality, and domain-specific terminology.
How is it different from Google Translate?Translator preserves paper layout, formulas, and citations. It uses advanced LLMs for higher-quality academic translation.
Can it translate YouTube subtitles?Yes. Turn on YouTube caption translation and a bilingual subtitle line — original plus your language — appears in real time as the video plays.
How is it better than YouTube auto-translate?It uses your own AI model with full-sentence context instead of word-by-word machine translation, so captions read naturally. You can also move, resize, and restyle the subtitle box.
Does YouTube translation work for any language?Yes. It translates whatever caption track the video provides into your chosen language, privately via your own key or a local LLM.
Can it translate entire web pages too?Yes. Translate any web page — news, blogs, docs, wikis — inline, with the original layout and typography preserved.

Ready to translate smarter?

Install Translator and start reading papers in any language.

Install on Chrome View on GitHub