Bilingual browser extension that translates pages, PDFs and subtitles
Immersive Translate is a browser extension that shows the original and the translation together instead of replacing one with the other. It works on web pages, PDFs, ebooks and video subtitles, and rather than shipping its own model it connects to a long list of engines: mainstream machine translation services, large language models, or an API key you supply yourself. That engine choice is the real differentiator, because a sensitive page can be routed to a local model while a difficult document goes to a stronger service, all without changing how you read. A free allowance covers everyday browsing, with a subscription for heavy use.
Last updated: 2026-09-20. This site only provides an index; for exact features, pricing, and licensing, see the official website.
reading foreign websites, academic pdfs, language learning and subtitle translation
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Mostly no. It is a reading layer that calls other engines, from mainstream translation services to large language models. You can also plug in your own provider key, which is how people route translations to a model they control.
Translated text is rendered alongside the original inside the document viewer, so the layout is largely preserved rather than reflowed into a separate file. Dense scientific PDFs are the hardest case and still need a second look.
There is a free allowance that covers casual reading. Regular users who translate long documents or want the higher-quality engines tend to end up on the paid tier once the free quota runs out.
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