Online Text Compare & Diff Tool
Compare two blocks of text side by side and see exactly what changed — only the differing words are highlighted, so edits jump out instead of whole lines lighting up. The diff runs entirely in your browser, so both versions stay private. It's handy for reviewing drafts, config changes, contracts or code.
- 100% free
- Private & safe
- Runs in your browser
Why use Text Compare?
Text Compare is a fast, distraction-free way to work with text: paste your content, transform it, and copy the result instantly.
- Runs instantly in your browser — nothing to install, nothing uploaded.
- Completely free, with no account, no watermarks and no usage limits.
- Handles Side-by-side diff with word-level highlighting; Added / removed / unchanged line summary.
- Paste the original text on the left and the changed version on the right.
- Works on any device — desktop, tablet and phone — and is fully keyboard accessible.
How to use Text Compare
- Paste the original text on the left and the changed version on the right.
- The two versions line up side by side, with changed lines paired and only the differing words highlighted.
- Review the summary counts of added, removed and unchanged lines.
- Edit either side, or swap them, to update the comparison instantly.
Examples
- Reviewing what changed between two drafts of an email or contract.
- Spotting the exact edited words between two config files.
- Comparing two versions of a code snippet line by line.
Supported formats & limits
- Side-by-side diff with word-level highlighting
- Added / removed / unchanged line summary
Limitations
- Line pairing is heuristic — heavily rewritten paragraphs may align imperfectly.
- Very large texts can take longer to diff.
- Whitespace differences are treated as changes.
Frequently asked questions
Does it highlight word-level changes?
Yes — when a line is edited, the two versions are paired and only the words that actually changed are highlighted, rather than lighting up the whole line.
Can it compare code or config?
Yes — any plain text works well, including code, config and CSV.
Is my text uploaded?
No — the comparison is computed entirely in your browser and nothing is sent anywhere.
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