OpenImmersive Translator: The Open-Source Alternative to Immersive Translate

If you read foreign-language websites, papers, or docs regularly, you've probably used a browser translator. Most of them are black boxes — you paste your text, it comes back translated, and you have no idea what happened in between.

OpenImmersive Translator takes a different approach: the translation engine is open source under AGPL-3.0. You can read the code, contribute to it, or run your own copy for free.

What it does

In the browser (Chrome, Firefox, Edge extension): open any page and read the original and the translation side by side. It also supports hover translation, selection translation, and input-box translation.

On the web: translate text, images, speech, websites, and documents in 190+ languages.

Document translation keeps the layout intact — tables, figures, equations, and page breaks stay where the author put them. Supported formats: PDF, DOCX, PPTX, XLSX, and SRT.

How it's different

• Open source: AGPL-3.0 licensed engine. Inspect it, fork it, self-host it.
• Privacy-first: content is translated and then discarded — not stored on servers.
• Your choice of AI: three quality tiers per translation. Fast is instant and free with no account. Standard and Premium use context-aware AI for natural, professional results. You can also bring your own DeepL, DeepSeek, OpenAI, or LibreTranslate key.

Try it

• Website: https://openimmersive.ai/
• GitHub: https://github.com/OpenImmersive/Open-Immersive-Translator
• Chrome: https://chromewebstore.google.com/detail/klahcooagpabkjnmhlelekijcjanhipb
• Firefox: https://addons.mozilla.org/firefox/addon/open-immersive-translator/

Free plan includes Fast translation with no sign-up. If you care about knowing how your translator works — not just what it outputs — it's worth a look.