# Text diff checker — compare two texts, no upload

> Compare two blocks of text and see additions, deletions, and changes line by line, in your browser. Nothing is uploaded — both sides stay in the tab.

Paste two versions of text and see a line-by-line diff of what was added, removed, and changed. The comparison happens in the browser, so neither side is uploaded.

A text diff is the fastest way to see exactly what changed between two versions — a pasted config, a rewritten paragraph, two API responses. Highlighting the differences saves squinting at near-identical blocks.

For diffing whole PDFs use the Compare PDFs tool; for tabular data, the Data Zone row diff compares CSVs by key.

## How to

1. **Paste both versions.** Put the original on one side and the new text on the other.
2. **Compare.** Differences are highlighted line by line.
3. **Review.** Scan additions, deletions, and edits at a glance.

## FAQ

### Can I diff config or code snippets?

Yes. Any text works — code, config, prose, logs — and changes are shown per line so edits stand out clearly.

### Does it show character-level changes?

It highlights changed lines and the differences within them, so small edits inside a line are visible, not just whole-line changes.

### Is my text uploaded to compare it?

No. Both blocks are diffed locally, so sensitive text never leaves the tab.


## Related tools

- [Format & minify](https://www.safepaper.app/dev/code-formatter)
- [Compare](https://www.safepaper.app/docs/compare)
- [Row diff](https://www.safepaper.app/data/diff)
- [JSON toolkit](https://www.safepaper.app/dev/json-toolkit)

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Canonical HTML: https://www.safepaper.app/dev/text-diff
Markdown: https://www.safepaper.app/dev/text-diff.md

There is no upload endpoint — your files are processed in this browser tab. Open your network tab and check.