Text Diff Checker

Free Online Text Diff Checker

Compare two text blocks instantly with our free online diff tool. Paste or drop a file into either box — added content highlights green, removed content red, and changed lines show word-level differences inline. Choose line, word, or character granularity, switch between split and unified views, and toggle “ignore case” or “ignore whitespace” to focus on meaningful changes. Share your comparison with a single link or export a standard .diff patch for GitHub or GitLab. Everything runs in your browser — your text never leaves your device.

How to Compare Two Texts

1. Paste, type, or drop a .txt / .md / .json / .csv file into the Original box.
2. Do the same with the revised version on the right.
3. Pick Split for side-by-side or Unified for a patch-style view.
4. Choose Line, Word, or Character granularity.
5. Toggle Ignore case or Ignore whitespace to skip trivial differences.
6. Click Share link to copy a URL that restores the exact state, or Copy as patch for a standard .diff.

Who Uses a Text Diff?

• Developers comparing API responses, configs, or code snippets outside their editor.
• Writers & editors tracking edits on drafts and client rewrites.
• Lawyers & contract reviewers spotting changes between contract versions.
• Data teams diffing two CSV exports to see which rows changed.
• QA engineers comparing expected vs. actual log output.
• Students checking their draft against an instructor's rewrite.

Why Use Our Text Diff Checker?

• Split and unified views in one tool.
• Line-level and word-level granularity with one click.
• Ignore case and whitespace options for clean comparisons.
• Exports a standard unified diff patch you can paste into GitHub, GitLab, or a pull request.
• Runs 100% in your browser — no uploads, no tracking of your content.
• Free forever, no signup, no limits.