Best Bilingual Webpage Translator Extensions: 7 Tools Compared

A good webpage translator should do more than turn one block of text into another language. It should match the way you actually read.

Some readers want the entire page translated while the source remains visible. Others only need help with one paragraph. Language learners may want saved vocabulary and flashcards, while researchers may care more about comparing translation engines or preserving technical terms.

This guide compares seven popular approaches so you can choose by workflow rather than by the length of a feature list.

Review note: Features were checked against official product pages and documentation on August 21, 2026. Prices, limits, supported browsers, and AI models can change. Confirm them on the provider's website before subscribing. This is a documented feature comparison, not a laboratory translation-quality benchmark.

The short answer

• BothLang is a strong fit when you want focused bilingual webpage reading with Google, Microsoft Edge, or eligible Gemini translation, plus hover, input-field, right-click, and YouTube workflows.
• Immersive Translate offers the broadest translation toolkit in this group, including webpages, documents, images, video subtitles, mobile access, and many translation services.
• Trancy is designed for learners who want bilingual webpages and video combined with vocabulary, grammar, speaking, and review tools.
• Readlang is best when click-to-translate reading and later vocabulary review matter more than translating the whole page.
• Mate Translate suits people who want a polished translator, phrasebook, pronunciation, and synchronization across several devices.
• Lingvanex combines page and selected-text translation with dictionary and text-to-speech tools across many browsers.
• Chrome's built-in translation remains the easiest option for occasional translation when you do not need a simultaneous bilingual layout.

Comparison table

The table describes product shape, not translation accuracy. Accuracy changes with the language pair, topic, sentence length, context, and provider behind the interface.

1. BothLang: best for focused bilingual web reading

BothLang keeps the original webpage text connected to its translation. That makes it useful when the source matters: reading foreign news, checking technical wording, following forum discussions, or learning from authentic material.

Its main distinction is the number of translation interactions built around the same reading flow:

• full-page bilingual translation;
• selected-text translation;
• paragraph translation with a hover shortcut;
• right-click page translation;
• translation previews in supported plain-text input fields;
• bilingual subtitles on YouTube videos with accessible captions;
• Google, Microsoft Edge, and eligible Gemini-powered translation options.

BothLang is available for Chrome, Edge, and Firefox. It does not currently promise PDF translation, image OCR, saved vocabulary, flashcards, speaking practice, Safari, or mobile apps. If one of those is central to your workflow, another product will fit better.

Explore the BothLang feature overview or choose your browser.

2. Immersive Translate: best for the widest translation coverage

Immersive Translate's official introduction describes bilingual webpage translation, input-box translation, PDF and eBook workflows, hover translation, mobile support, and more than ten translation services. Its current documentation also covers image, manga, and bilingual subtitle features.

That breadth is the reason to choose it. A reader who moves between webpages, PDFs, eBooks, images, YouTube, and mobile browsing can keep those jobs inside one product. It also gives advanced users a larger translation-engine ecosystem than BothLang.

The tradeoff is complexity. More formats, services, account options, and controls mean more decisions. If your main job is simply reading webpages in two languages, you may not need the extra surface area.

Choose Immersive Translate when format coverage and provider choice matter more than having a narrower interface.

3. Trancy: best for active language learning from video and webpages

Trancy combines translation with a learning system. Its official product page lists bilingual webpages, paragraph translation, multiple translation engines, bilingual subtitles, word collection, grammar analysis, speaking practice, and learning decks. Its download page lists Chrome, Edge, Firefox, Safari, and several related browser options.

This makes Trancy a good fit when translation is the first step in a study loop. You can encounter a word in a video or article, save it, analyze the sentence, and review the material later.

That is also the dividing line. Someone who only wants a clean bilingual reading layer may find the learning features unnecessary. Someone preparing for listening, vocabulary, or speaking practice may find them more valuable than a translation-only tool.

Choose Trancy when you want your browsing and watch history to become structured study material.

4. Readlang: best for click-to-translate reading and vocabulary review

Readlang takes a different approach. Instead of translating every paragraph automatically, it lets you click a word or drag across a phrase while reading. Those lookups can become flashcards for later review.

The Readlang features page lists an online reader, a Web Reader, context-aware explanations, flashcards, a vocabulary manager, dictionary integration, and a transcript-based video player. That combination is deliberately centered on learning from texts.

Readlang is a particularly good choice if you already understand most of the page and want help only at points of difficulty. It is less suitable if your first requirement is to understand an entire unfamiliar page immediately in a paragraph-by-paragraph bilingual layout.

Choose Readlang when remembering the words you look up matters more than translating everything around them.

5. Mate Translate: best for a polished cross-device phrasebook

Mate combines browser translation with native apps, pronunciation, saved phrases, history synchronization, and dictionary-style reference information. Its official download page lists browser versions for Chrome, Firefox, Opera, Edge, Arc, and Brave, alongside Mac and iOS products.

Mate is a natural fit for people who translate short passages throughout the day and want those translations available across devices. Phrase saving and pronunciation make it useful for travel, writing, and recurring vocabulary.

Its center of gravity is a cross-platform personal translator rather than a paragraph-by-paragraph learning layer. Check the exact page-translation behavior on your browser before paying, because capabilities can differ between browser and native-app editions.

Choose Mate when synchronized history, a phrasebook, and polished native apps are more important than choosing among several translation engines.

6. Lingvanex: best for translation plus dictionary and speech tools

Lingvanex's browser-extension page describes selected-text and whole-page translation, dictionary information, contextual examples, bookmarks, history, and text-to-speech across Chrome, Edge, Firefox, Opera, and Safari.

That makes it useful for readers who frequently move between comprehension and pronunciation. A word can be translated, inspected, and heard without opening a separate dictionary.

Lingvanex also sells broader translation products, so read the extension-specific page rather than assuming every Lingvanex business, offline, or API capability is included in the browser add-on.

Choose Lingvanex when dictionary and voice features are as important as translating the page.

7. Chrome's built-in translator: best for occasional simplicity

Chrome's translation is already in the browser, requires no additional extension, and handles the most common job: turn a foreign-language page into a language you understand.

Google's website translation instructions explain how users can switch between the translated website and the original. That is convenient for checking one version at a time, but it is different from keeping each source paragraph beside its translation.

Choose the built-in translator when you translate occasionally, want minimal setup, and do not need hover tools, engine choice, saved vocabulary, or a persistent bilingual view.

How to choose the right translator

Ask these questions in order.

Do you need both languages visible at once?

If yes, start with BothLang, Immersive Translate, or Trancy. If toggling between original and translation is enough, browser-native translation may solve the problem without another extension.

Are you translating or studying?

For immediate comprehension, BothLang and Immersive Translate are direct fits. For a study loop with saved vocabulary and exercises, compare Trancy and Readlang.

Do you work beyond ordinary webpages?

Immersive Translate is the strongest candidate here because of its document, image, video, and mobile scope. Do not choose BothLang for PDF or image translation: those are not current BothLang features.

Do you need to write as well as read?

BothLang can preview translations in supported plain-text input fields before replacing, copying, or inserting a bilingual result. Immersive Translate and Trancy also advertise input or conversation-oriented tools. Test the exact editor you use because rich-text applications can behave differently.

Which translation engine do you trust?

No engine wins every language pair. If comparison matters, choose a tool that lets you change providers and keep the source visible. Then test it with the material you actually read: news, informal comments, technical documentation, or academic prose.

Our recommendation by reader

• Casual reader: use your browser's built-in translation first.
• Bilingual webpage reader: try BothLang for a focused workflow or Immersive Translate for broader coverage.
• Video-centered learner: compare Trancy and Immersive Translate; try BothLang if YouTube is the only video platform you need.
• Vocabulary-focused learner: start with Readlang or Trancy.
• Cross-device phrase collector: consider Mate.
• Dictionary and pronunciation user: consider Lingvanex or Mate.
• Document and image translator: choose a product that explicitly supports those formats; BothLang currently does not.

Try bilingual reading without losing the source

If your goal is to understand webpages while keeping their original wording available, explore BothLang's bilingual webpage translator. You can install it from the official stores for Chrome, Microsoft Edge, or Firefox.

Whichever tool you choose, keep consequential names, numbers, quotations, and technical terms open to verification. A convenient translation is still an interpretation of the source.