5 Best Free Diff Checkers Online in 2026

By SpunkArt13 · March 16, 2026

Need to compare two versions of code or text? These free diff checkers highlight every difference.

1. spunk.codes Diff Checker

Our free diff checker shows side-by-side comparison with color-coded additions (green) and removals (red). Line and word diff modes.

2. Diffchecker.com

The most popular online diff tool. Supports text, images, PDFs, and folders. Free tier has ads.

3. Text-Compare.com

Simple two-panel text comparison with merge capabilities.

4. Code Diff

Specialized for code with syntax highlighting for 100+ languages.

5. Meld

Desktop diff tool (free, open source) for when you need offline access and directory comparison.