Text Diff Checker
Compare two texts line by line and see additions, deletions and unchanged lines instantly. Free online diff tool, runs in your browser.
Green lines were added, red lines were removed. Works with code, configs and any plain text.
Frequently asked questions
- Is this diff tool free to use?
- Yes, completely free with no signup, no limits and no watermark. You can compare as many texts as you like.
- Does my text leave my browser?
- No. The comparison runs entirely in your browser with JavaScript. Nothing is uploaded to any server.
- How does the line diff work?
- It finds the longest common subsequence of lines, then marks lines that only exist in one version as added or removed.
- Can I compare code or config files?
- Yes, any plain text works: source code, JSON, YAML, CSV or prose. Very large files over about 500 lines per side may be slow.
This tool runs entirely in your browser. No data is uploaded anywhere.