DualTrans
An immersive bilingual web translation and YouTube dual subtitles extension for Chrome and Edge.
Developer Tools·AI & Machine Learning·Productivity
What is DualTrans?
DualTrans is a browser extension that translates web pages into bilingual, side-by-side reading views. Instead of replacing the original page with a single translated version, it embeds translations directly beneath the source text while preserving the page's structure and code. It also offers YouTube and video dual subtitles, instant selection lookup for words and definitions, and a floating quick-action ball for one-click full-page translation.
DualTrans is aimed at people who read foreign-language material and want to check the source as they go. The page highlights software engineers reading documentation and GitHub issues, researchers skimming academic papers with LaTeX formulas, business analysts following international news, and language learners studying lectures, TED talks, and podcasts.
The extension supports several AI model options. Pro Cloud provides managed access to DeepSeek, Gemini, Claude, and OpenAI models without requiring an API key. Bring Your Own Key lets users connect their own keys from supported providers, including OpenAI-compatible endpoints and local Ollama models, with keys stored in local browser storage. When AI quota is unavailable, the extension can fall back to free classic engines such as Google Translate and Microsoft Edge Neural Translate.
What sets it apart, according to the page, is its focus on layout and reading comfort: six selectable translation styles, sidebar previews, and a design that keeps code blocks, tables, and math formulas intact.
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