Free Text Diff & Merger
Compare two texts side by side, highlight differences, and merge them together seamlessly. Free, fast, and works entirely in your browser with no sign-up required.
Text Diff & Merger
Compare texts, visualize differences, and merge with conflict resolution. Supports 2-way and 3-way merge with multiple strategies.
Compare two texts directly.
Original (Left)
Modified (Right)
About Text Diff & Merger
Compare two or three versions of text, see differences highlighted with syntax coloring and word-level inline diffs, and merge them with full conflict resolution. Supports undo/redo, custom edits, session history, multiple merge strategies, keyboard shortcuts, and export as patch, conflict markers, or conflict report.
- Green (+): Added lines
- Red (-): Removed lines
- Yellow (!): True conflict
- Cyan: Auto-mergeable
- Blue: Resolved conflict
- highlighted: Changed words
- Left: Keep left version
- Right: Keep right version
- Both: Include both versions
- Custom: Write your own merge
- Per-line: Accept/reject each line
- Unresolve: Revert a resolution
- Manual: Resolve each conflict
- Auto: Auto-merge non-conflicting
- Take Ours: Always use left
- Take Theirs: Always use right
- Auto-resolve Safe: 3-way only
- 2-way and 3-way merge
- Word-level inline diffs
- Auto-mergeable detection
- Keyboard shortcuts
- Undo/redo (up to 50 steps)
- Conflict map navigation
- Custom text for conflicts
- Export patch, markers, report
- Save/load sessions
- Swap sides
- Configurable context lines
Frequently Asked Questions
What is the Text Diff & Merger?
The Text Diff & Merger is a free online tool that compares two texts, highlights differences, and lets you merge them together.
Is the Text Diff & Merger free?
Yes, it is completely free with no registration required. All comparison and merging happens client-side in your browser.
Does it store my text data?
No, the Text Diff & Merger processes everything locally in your browser. No data is sent to any server.
Does the Text Diff & Merger work on mobile devices?
Yes, the Text Diff & Merger is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the Text Diff & Merger in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
Can I process large amounts of text?
Yes, the Text Diff & Merger handles text of any length with fast, real-time processing. Since everything runs in your browser, performance depends on your device but works well for most use cases.
How do I use the Text Diff & Merger?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The Text Diff & Merger works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
Related Tools
Free Word Counter Online
Count words, characters, sentences, paragraphs, and reading time instantly. Free online word counter tool. Works entirely in your browser with no sign-up required.
Free Text Case Converter Online
Convert text to uppercase, lowercase, title case, or sentence case. Free online case converter. Works entirely in your browser with no sign-up required.
Free Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text for design and development projects. Free, fast, and works entirely in your browser with no sign-up required.
Free Text Compare Tool
Compare two texts side by side and highlight differences. Free diff checker tool. Works entirely in your browser with no sign-up required.
About Free Text Diff & Merger
Free Text Diff & Merger is a free, browser-based tool in our Text Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.