Immersive Translate: Free AI Bilingual Translation for Web Pages and Video Subtitles

Immersive Translate is a free, AI-driven extension that renders foreign-language pages in a bilingual layout instead of replacing the text. Rather than swapping every sentence for a translation, it inserts the translated line beneath each paragraph of the original, so you can read a page in your own language while keeping the source wording, terminology and tone in view.

The extension detects the main content area of a page and translates only the parts you actually read, which stops navigation bars, ad slots and footers from being turned into clutter. For anyone who works through English documentation, papers or news every day, this side-by-side model is usually more useful than a full-page replacement: technical terms and quoted figures stay verifiable right next to the translation.

The same bilingual idea reaches beyond pages. Video platforms get dual subtitles, any input field on a page can act as a translator, and local files such as PDFs, subtitle tracks and plain text are handled in the same panel, so reading, watching, searching and archiving sit in one workflow.

Key features

• Main-content detection with bilingual layout: the extension identifies the primary content region and inserts translations paragraph by paragraph, leaving unrelated parts of the page untouched.
• Video subtitle translation: bilingual subtitles on dozens of major platforms including YouTube, Netflix and Coursera, so lectures and interviews can be watched without pausing to look words up.
• Input-field translation: any text box on a page becomes a multilingual translator, which is convenient when searching or chatting in a target language from Google and similar tools.
• File translation: real-time bilingual translation for PDFs, subtitle files and TXT, with one-click export of a bilingual ebook for offline study or archiving.
• Paragraph hover translation: hovering over a paragraph shows its translation immediately while keeping the surrounding context, which suits close reading where you only need to confirm one passage.
• Tuned for major sites: dedicated adaptations for Google, Twitter, Reddit, YouTube, Bloomberg and The Wall Street Journal keep layouts readable after translation on search, social and news feeds.
• Desktop and mobile: beyond desktop browsers, the extension also covers mobile devices, so bilingual reading works on phones and tablets too.
• More than ten translation services: DeepL, Microsoft Translator, Google Translate, Tencent Translate and others can be chosen per language pair or content type.

How to use it

1. Install the extension from your browser's extension store. An icon appears in the toolbar once installation finishes.
2. Pick a translation service in the settings panel. Choose one built-in engine as the default, or add your own account or key for that service if you already have one.
3. Translate the current page by clicking the toolbar icon or pressing the keyboard shortcut. The page switches to a bilingual layout; click again to return to the original.
4. Turn on the specialised modes you need, such as video subtitles, input-field translation and hover translation, then use them directly in the matching context.
5. Translate a file by uploading a PDF, subtitle or TXT file in the extension panel, previewing the bilingual result, and exporting a bilingual ebook when you want a local copy.

Where it fits

• Research across languages: reading English technical documentation, paper abstracts and industry reports while checking the original phrasing alongside the translation.
• Language study and close reading: treating the translation as support rather than a substitute, comparing paragraph by paragraph to pick up terminology and idiom.
• Cross-border work: typing in your own language on overseas social platforms, forums and search pages instead of switching between several tools.
• Video courses: dual subtitles for open courses, conference talks and interviews, so you can follow along without constant pausing.
• Archiving and sharing: exporting long articles or reports as bilingual ebooks for offline reading or for colleagues.

Limits to keep in mind

• The extension has to be installed in a supported browser, and which features are available on mobile depends on the platform.
• Site-specific tuning covers the major sites listed above. Other sites usually receive the general page translation, and their layout may need small adjustments.
• Translation quality depends on the chosen service and language pair. Technical terms, slang and wordplay may still need human review.
• Video subtitles rely on the platform providing a usable subtitle track; videos without one cannot be given dual subtitles directly.
• File results depend on the format and layout complexity of the original; scanned PDFs without a text layer may not be recognised correctly.
• Translating many pages and long documents consumes the quota of the selected service, and that quota follows the provider's own rules.
• Content behind a login, a paywall or heavy dynamic loading may not be captured completely.

FAQ

Is Immersive Translate free? The extension itself is free and ships with translation services you can use directly. If you connect a third-party service with your own account or key, the quota and any charges are set by that provider.

How is bilingual reading different from replacing the page? Replacing the page leaves only the translation. Bilingual reading inserts the translation under the original text, so you can always return to the source to check terminology and tone, which suits study and professional reading better.

Can it translate subtitles in videos? Yes. It supports dual subtitles on dozens of platforms including YouTube, Netflix and Coursera, as long as the video itself carries a usable subtitle track.

Which file formats can it translate? According to the product description, PDF, subtitle files and TXT are supported for real-time bilingual translation, with one-click bilingual ebook export. The exact format coverage changes between versions, so check the panel before relying on a specific type.