OnlyTranslate

Project Overview

OnlyTranslate (只译) is an open-source bilingual reading browser extension that supports translation of webpage content, video subtitles, local EPUB ebooks, and local or online PDFs, while preserving the original structure and reading rhythm as much as possible. No OnlyTranslate account is required, and no subscription is bound; you choose your own translation service.

Key Features

• Reading Mode / Full-Page Translation: Reading mode focuses on main content like articles and comments; full-page mode covers more visible text
• Bilingual / Translation-Only: Keep the original text for comparison and learning, or show only the translation
• Multiple Entry Points: Translate via popup, floating toolbar, keyboard shortcut, or context menu
• Word Selection, Hover, and Input Box Translation: Select text, point at text, or preview translation candidates near the cursor
• Video Subtitle Translation: Automatically fetches original subtitles from supported sites, translating with context and displaying bilingual subtitles
• EPUB Ebook Translation (Beta): Import local DRM-free EPUBs with chapter auto-translation, table of contents, reading progress, bookmarks, and reading style settings
• PDF Document Translation (Beta): Read local or accessible online PDFs with thumbnail navigation and bilingual / translation-only / original-only switching
• Flexible Translation Services: Presets for Microsoft Translator, Google Translate, Chrome built-in translation, DeepL, OpenAI, DeepSeek, Gemini, Claude, and more

Target Audience

• Users who need bilingual reading of webpages, documents, or ebooks
• Language learners and researchers
• Chrome and Edge users

Quick Start

1. Install OnlyTranslate from the Chrome Web Store
2. Open the webpage you want to translate and click the OnlyTranslate icon in the toolbar
3. Select a translation service (Microsoft Translator, Google Translate, and other zero-config services work immediately)
4. Click "Translate Current Page" to start

Core Advantages

• Open-source and free, no account required
• Supports webpages, video subtitles, EPUB, and PDF
• Flexible translation service choices
• Privacy-friendly

System Requirements

• Browsers: Chrome, Edge