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Text Diff Checker
Compare two blocks of text
Everything runs locally in your browser. Your data never leaves your device.
About this tool
Paste two versions of text to see exactly what changed. Additions and deletions are highlighted line by line, with options to ignore case or whitespace.
Useful for config reviews, log comparisons, and code snippets, privately, without uploading either side to a server.
How to use it
- Paste the original text in one panel and the new text in the other.
- Optionally ignore case or whitespace differences.
- Run the comparison to highlight changes.
- Review added, removed, and unchanged lines, then copy what you need.
Common use cases
- Compare config files before deploying.
- Spot changes between log excerpts.
- Review copy edits in documentation drafts.
- Diff code snippets when a full Git UI is overkill.
Frequently asked questions
Is either text uploaded?
No. Diffing runs entirely in your browser.
Can I ignore whitespace?
Yes. Enable the option to focus on meaningful changes.
Is this a full Git diff?
It is a fast text diff for two pasted inputs, not a repository viewer.
Does order matter?
Yes. Left/original vs right/new determines what counts as added or removed.
How large can the inputs be?
Typical configs and snippets are fine; very large files may be limited by browser memory.