Text Diff Checker Online
Compare two texts and highlight differences line by line. Free, fast, and runs 100% in your browser.
Code reviews, contract revisions, document versioning — all require identifying exactly what changed between two versions of text. This diff checker highlights additions, deletions, and modifications with color-coded output. Compare any two text blocks side-by-side with both line-level and character-level precision.
Paste text in both fields to see differences
Uses LCS algorithm for accurate line-by-line comparison
Feature Overview
| Feature | Details |
|---|---|
| Side-by-side view | ✓ |
| Line-level diff | ✓ |
| Character-level diff | ✓ |
| Color-coded output | ✓ |
| Privacy | 100% client-side |
Frequently Asked Questions
Does it show character-level differences?
Yes. Within changed lines, individual character differences are highlighted so you can spot even single-character changes.
Can I compare code files?
Absolutely. The diff checker works with any plain text including source code, configuration files, and log outputs.
Is there a size limit?
No hard limit. Performance depends on text length, but most comparisons under 100KB are instant.