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Compare code! Powerful Side-by-Side & Unified Diff Viewer for developers.
DiffViewer is a developer-friendly, high-performance code diff viewer for Android. Experience seamless code reviews and diff analysis on the go with Android Studio-style Side-by-Side and Unified views. ────── #### 🌟 Key Features 1. Dual Diff Viewing Modes • Side-by-Side (Split) Mode: View Original and Modified files side by side with pixel-perfect synchronized vertical and horizontal scrolling. • Unified Mode: A clean vertical stream showing code modifications with + and - indicators. 2. Flexible Input Sources • Raw Text & Files: Paste code directly or pick local files to compare instantly. • GitHub Commit Viewer: Paste any GitHub commit URL to fetch changed files and diffs automatically (supports private repositories with GitHub PAT). • Git Patch Parser: Paste .patch or unified diff outputs; DiffViewer automatically parses and organizes changes per file. 3. Fine-grained Inline Diff & Smart Folding • Word / Character Level Granularity: Accurately highlights exact modifications within edited lines. • Context-aware Code Folding: Collapses unchanged lines into banners while keeping context lines around changes. Expand or collapse blocks individually or all at once. 4. File Review Status Tracking • Track progress for every file in your review: • Status indicators: 🔹 Open | 👀 Reviewing | 🟡 Pending | 💬 Commented | ✅ Approved | 🔴 Closed | 🟣 Merged • Update status with a single tap directly from the tab bar or the tabs sheet dialog. 5. Line-by-Line Code Comments • Long-press any line of code to add, edit, or remove inline review notes and comments. 6. Handy Developer Utilities • Swap Content: Instantly swap Before and After contents with a single click. • Copy Git Patch: Copy diff contents formatted as standard unified git patches. • Export as Image: Capture the visible diff viewport or the entire diff page as a high-resolution image to share with your team. • Whitespace Ignore Modes: Strict, ignore leading/trailing indents, collapse whitespace, or ignore all whitespace. • Syntax Highlighting: Supports Kotlin, Java, Python, JavaScript, TypeScript, C/C++, C#, and more. 7. Multi-Tab & Project Organization • Navigate between files seamlessly with tabs and the full tabs list dialog. • Star favorites (⭐), rename diffs, and organize your work across multiple diff groups. 8. Dark Mode & Multilingual • Automatic, Light, and Dark themes. • Fully localized in 17 languages including English, Korean, Japanese, Chinese, Spanish, German, French, and more.