# Text Diff Checker

> Paste both versions, hit Compare, and see exactly what changed - additions, deletions, and untouched lines.

Compare two texts free and see every added, removed, and unchanged line highlighted. Runs entirely in your browser - drafts stay private.

- **Canonical:** https://www.ailovekit.com/text/diff-checker/
- **Category:** Text Tools
- **Processing:** Runs entirely in your browser. Files are never uploaded to AiLoveKit servers.

## See Every Change at a Glance

AiLoveKit's **text diff checker** runs a real longest-common-subsequence algorithm on your two versions, then highlights removed lines in red and added lines in green - the same approach as git diff, but for any pasted text. Contracts, essays, config files, and copy revisions all stay on your device.

## How to Read the Output

- **- red lines** - present only in version A (removed).

- **+ green lines** - present only in version B (added).

- **grey lines** - unchanged context shared by both.

Comparing PDF contracts instead? Use [Compare PDFs](https://www.ailovekit.com/pdf/compare/) for a visual page-level diff.

## Frequently Asked Questions

**How does the comparison work?**

A line-based longest-common-subsequence algorithm aligns the two texts, so moved and edited lines surface as paired removals and additions.

**Is there a size limit?**

For a responsive experience, keep each side under 1500 lines. Larger texts still work but take longer.

**Is my text uploaded?**

No - the diff runs entirely in your browser tab. Sensitive drafts and contracts never leave your device.

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Source: https://www.ailovekit.com/text/diff-checker/
Part of AiLoveKit: https://www.ailovekit.com/
Machine-readable index: https://www.ailovekit.com/llms.txt