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Open & Transparent

Bilingual AI translation, made effortless.

Fluent bilingual text right below each paragraph. Read foreign articles, PDF papers, and video subtitles without breaking your flow.

  • Chrome
  • Edge
  • Firefox
  • Safari
  • Offline package
  • GitHub

The browser extension and the open-source code on GitHub are almost ready. Join to get them first — one email at launch, no spam.

How it works

Three steps, nothing to set up

  1. 1

    Add it to your browser

    One click from the Chrome, Edge, Firefox or Safari store. Free.

  2. 2

    Open any page

    News, papers, docs or a video — click the icon or press a shortcut.

  3. 3

    Read in two languages

    The translation appears right under each paragraph. The original stays.

Translate anything

Everything you read, in two languages

Everything below comes with the browser extension — coming soon.

  • Streaming bilingual subtitles

    Dual-line subtitles on YouTube, Netflix, and lectures: original above, translation below.

  • PDF & documents, layout preserved

    Two-column layouts, tables, and formulas stay intact without broken formatting.

  • 100+ languages

    From English and Chinese to Swahili and Icelandic, both ways.

  • Select or hover for instant lookup

    Select or hover over any word for instant definitions, phonetics, and audio.

  • Select or hover for instant lookup

    Select or hover over any word for instant definitions, phonetics, and audio.

  • Type in any language

    Type text into any input box on the page to translate it instantly into your target language.

  • Customizable shortcuts

    Turn translation on and off with quick hotkeys, no mouse needed.

  • Your own glossary

    Fix key terms and industry jargon once, keep translations consistent everywhere.

Who it's for

Whether for study, video streaming, or work

  • Study & Language Learning

    Read foreign periodicals, research papers, and study guides with paragraph-level alignment. Look up words instantly and build fluency as you read.

    • Global periodicals
    • Academic papers
    • Lecture videos

  • Workplace & Cross-Border Business

    Read market reports and competitor sites without broken layouts. Compare foreign PDFs side by side, and handle cross-border emails and specs with confidence.

    • Market reports
    • Product manuals
    • Business emails

  • Video Streaming & Global Insights

    Enjoy real-time bilingual subtitles on YouTube, and explore X (Twitter) and Reddit with inline translations. Stay on top of global news and trends without missing a beat.

    • YouTube subtitles
    • X / Twitter feeds
    • Reddit discussions
Integrations

40+ translation engines, one extension

Every major AI model and translation service, from OpenAI and DeepL to models that run on your own computer. Pick the one you trust, or let us pick for you.

  • OpenAI
  • Claude
  • Gemini
  • DeepSeek
  • Qwen
  • Kimi
  • GLM
  • Doubao
  • Hunyuan
  • ERNIE
  • Mistral
  • Grok
  • Llama
  • MiniMax
  • Yi
  • Step
  • Baichuan
  • Spark
  • Cohere
  • Perplexity
  • Google Translate
  • Microsoft Translator
  • DeepL
  • Yandex
  • Baidu Translate
  • Youdao
  • Caiyun Xiaoyi
  • NiuTrans
  • Papago
  • Tencent Translate
  • Alibaba Translate
  • Volcengine Translate
  • Azure OpenAI
  • Vertex AI
  • Amazon Bedrock
  • OpenRouter
  • SiliconFlow
  • Groq
  • NVIDIA NIM
  • Ollama
  • LM Studio
  • Bring your own API key
  • Run offline local models
  • Or use zero-setup managed cloud

See all 41 supported engines

Comparison

Built for Trust: See How OpenTranslate Compares

Transparent code, zero tracking. See how the three approaches compare.

OpenTranslateTraditional Commercial ExtensionsBare Scripts & Extensions
Source Code & AuditabilityCan anyone independently inspect the extension's source code?Open-source core (GPL-3.0) on GitHubProprietary closed sourceUsually open source
Bring Your Own Key (BYOK)Freedom to connect OpenAI, Claude, DeepSeek, or Gemini keys directlyUnthrottled & unlimited BYOK forever with zero markupsBasic support; advanced tools steer toward paid creditsSupported
Full-Scenario Bilingual ReadingBilingual web paragraphs, preserved PDF layout & video subtitlesWeb, PDF layout & video subtitles, free forever with BYOKFull coverage; complex formats require paid creditsWebpage plain text only
Distraction-Free ReadingIntrusive upgrade banners, promotional popups & forced loginsZero popups, no account required to use extensionFrequent upgrade prompts & account requirementsNo ads or popups
Zero Telemetry & PrivacyAre visited URLs or translated texts sent to tracking servers?0 telemetry, direct to official API or local modelsCentralized cloud routing & usage telemetryLocal processing only
Zero-Setup Managed CloudTurnkey cloud channels for users who prefer not to manage API keysOptional zero-setup managed cloud serviceCore commercial tier with mandatory upgrade promptsNo cloud infrastructure or hosting support
Open & Private

Open code, private by default, free with BYOK

  • 20+AI models with BYOK — connect official keys directly with zero markup or rate caps
  • 100%Fully customizable — tweak prompts, styles, and models; your ideal workflow, defined by you
  • 0Browsing data tracked — never logs visited URLs, supports offline local models

opentranslatehq

opentranslate

The core extension is open on GitHub and free forever with BYOK. Hosted zero-setup cloud translation is an optional convenience service for users who prefer not to manage API keys.

  • GPL-3.0
  • No tracking
  • Open code
Open on GitHub · Free with BYOKStar

OpenTranslate FAQ

Read without borders

  • Chrome
  • Edge
  • Firefox
  • Safari
  • Offline package
  • GitHub