DualTrans LogoDualTrans
🔥 Immersive Bilingual Reading · Powered by DeepSeek, Claude & Gemini

Next-Gen Immersive Bilingual Web Translation
& YouTube Dual Subtitles Extension

Break through the limits of traditional mechanical translation while preserving 100% of webpage structure and code. Driven by DeepSeek and leading LLMs with deep contextual comprehension, making foreign technical docs, research papers, and YouTube dual subtitles feel as natural as your native tongue.

✓ Immersive bilingual alignment with zero layout breakage✓ YouTube & video dual-subtitles synchronization✓ Zero-config Pro Cloud + BYO-Key local privacy✓ Instant selection lookup & floating quick-action ball
https://developer.mozilla.org/es/articles/modern-web-architecture
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Arquitecturas Web de Próxima Generación: Del Monolito a los Agentes Inteligentes

Next-Generation Web Architectures: From Monolith to Intelligent Agents

Los equipos de ingeniería modernos están evolucionando de arquitecturas monolíticas frágiles a entornos de ejecución dinámicos y conscientes del contexto. Al aprovechar las APIs nativas del navegador y la aceleración de LLM locales, las experiencias interactivas logran latencias de submilisegundos protegiendo la privacidad del usuario.

Modern engineering teams are transitioning away from brittle monolithic web stacks toward dynamic, context-aware runtimes. By leveraging browser-native APIs and local LLM acceleration, interactive web experiences can achieve sub-millisecond latencies without sacrificing end-user privacy.

Tailored for Bilingual Reading & Language Immersion

Say goodbye to rigid word-for-word replacements. DualTrans preserves bilingual alignment, empowering you to absorb global knowledge in authentic contexts.

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Intelligent Bilingual Alignment, Zero Code & Layout Breakage

Engineered for technical documentation and in-depth research. High-precision DOM node traversal embeds translations directly beneath original text. Code blocks, LaTeX math formulas, tables, and interactive buttons retain 100% of their original structure.

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YouTube & Video Dual Subtitles Synchronized (Language Learning Powerhouse)

Native dual-subtitle support for online videos. Real-time audio transcript parsing powered by top LLMs with simultaneous dual-line display. Enjoy university lectures, tech keynotes, and podcasts without language friction.

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Instant Selection Lookup & Floating Ball

Highlight any text to reveal an instant inline translation badge for word lookups and definitions. A sleek floating ball on the page edge offers one-click full-page translation at your fingertips.

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6 Carefully Crafted Immersive Translation Styles

Includes None, Dotted Underline, Marker, Quote Block, Subtle, and Hover Learn. Easily preview and switch styles in the sidebar to prevent visual fatigue during marathon reading sessions.

Leading AI Model Matrix · Zero-Config Cloud & BYO-Key

Deeply integrated with DeepSeek, Gemini, Claude, and OpenAI. Seamless convenience meets uncompromising privacy for developers.

Recommended · Pro Cloud
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Official Managed AI Models

No tedious API key registration required. Instant access with Pro membership, automatically selecting specialized translation experts based on website context:

DeepSeek Flagship SeriesNative-level fluency & precision
Google Gemini SeriesUltra-fast response on long-form text
Anthropic Claude SeriesNuanced, literary polish
OpenAI / ChatGPT SeriesRock-solid concurrency & reasoning
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Bring Your Own Key (BYO-Key)

Use your personal API keys with any supported LLM provider. Ideal for developers and power users with zero extra markup:

Absolute Local Privacy
Keys remain securely in browser local storage and are never sent to remote servers.
OpenAI-Compatible Protocols
Connect Moonshot, Qwen, SiliconFlow, or any custom API endpoint.
Local Private Models (Ollama)
Directly connect to local Ollama instances for completely offline translation.
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Classic Free Translation Engines

Even without AI quota or in offline environments, DualTrans provides high-speed direct access to traditional engines:

Official Google Translate
Sub-second response with support for over 100 languages.
Microsoft Edge Neural Translate
Smooth and stable connection globally, 100% free and unlimited.
Intelligent Graceful Fallback
Automatically falls back to backup engines if LLM rate limits are hit.

Versatile Translation Styles for Effortless Distinction

Every reader has unique preferences. DualTrans offers 6 polished visual styles with instant sidebar previews and effortless switching.

A None
None
Clean & natural, blends with native typography
A Underline
Dotted Underline
Understated and clear structural hierarchy
A Marker
Marker
Hand-highlighted aesthetic, distinct & vivid
A Quote
Quote Block
Classic left border quote style, well-tiered
A Subtle
Subtle
Lightened translation weight, focus on source
A Hover Learn
Hover Learn
Appears on mouse hover, immersive practice

Empowering Global Explorers & Lifelong Learners

From deep engineering debugging and academic research to global business intelligence, DualTrans is your trusted copilot.

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Software Engineers & Developers

Read GitHub Issues, StackOverflow, MDN documentation, and open-source RFCs with precision. Code snippets and technical terms remain intact.

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Researchers & Academic Scholars

Skim arXiv, Google Scholar, and Nature publications faster. LaTeX mathematical formulas and academic jargon are faithfully preserved.

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Cross-Border Business & Analysts

Track Product Hunt, TechCrunch, Reddit, and international competitors in real time to capture industry developments instantaneously.

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Language Learners & Video Enthusiasts

Learn from open university lectures and TED talks with YouTube dual subtitles. Absorb vocabulary and listening naturally.

Frequently Asked Questions (FAQ)

Learn about DualTrans core advantages, privacy policy, and usage guidelines.

How does DualTrans differ from Chrome's built-in translation?▼
Chrome's default translation forcefully replaces the entire page with target text, frequently corrupting layouts, destroying code blocks, and preventing source verification. DualTrans employs intelligent bilingual alignment, presenting source and translation side-by-side powered by modern LLMs for natural, human-grade comprehension.
Is DualTrans free? What does BYO-Key mean?▼
DualTrans's core functionality is completely free, including built-in Google and Microsoft translation engines. If you have API keys from OpenAI, DeepSeek, or SiliconFlow, you can input them to call LLMs directly for free. If you prefer not to manage API keys, our Pro subscription gives you instant access to top-tier managed AI models.
Are my API keys or browsing history uploaded to your servers?▼
Never. DualTrans strictly adheres to a local-first privacy architecture. Your API keys and configuration preferences are encrypted in your local browser storage. Translation requests are dispatched directly from your browser to the respective API endpoint without intermediate proxies.
Which browsers are supported by DualTrans?▼
DualTrans supports all major Chromium-based browsers, including Google Chrome, Microsoft Edge, Brave, Arc, and Vivaldi. It can be installed with a single click from the Chrome Web Store or Edge Add-ons store.
How does DualTrans compare to traditional translators and Immersive Translate?▼
DualTrans is purpose-built for the AI era: 1. Powered by cutting-edge LLMs (DeepSeek, Claude 3.5, Gemini 1.5), delivering nuanced context understanding and superior technical translation; 2. Native dual-line synchronized subtitles for YouTube; 3. Absolute local privacy with support for custom API keys and local Ollama models without intermediate proxy servers.
How do I enable bilingual subtitles on YouTube?▼
Once the extension is installed, open any YouTube video with captions. A DualTrans subtitle toggle button will automatically appear on the video player controls. Click it to display synchronized bilingual subtitles.

Start Your Pure, High-Efficiency Bilingual Reading Today

Join tens of thousands of developers, researchers, and language learners discovering global knowledge with DualTrans.

Install Extension FreeGitHub Open Source