Side by Side Diff — Synchronized Scroll · Change Navigation · All Languages
Real-time diff · Character-level · AI summary · Merge mode · Timeline · Git export · 100% browser
Compare code in a true side-by-side split view. Original on the left, modified on the right. Use the navigation arrows to jump between changes — never lose your place in a large diff.
What is a Code Diff Checker?
A diff checker compares two versions of text or code and highlights what changed. It shows added lines in green, removed lines in red, and changed lines in amber — exactly like git diff or a pull request review on GitHub.
Key Features
This tool includes side-by-side and inline views, character-level diff highlighting (exact words that changed), three diff algorithms (Myers, Patience, Histogram), AI-powered plain English summaries, 3-way merge mode, change timeline, and multiple export formats including .diff (git patch) and HTML reports.
Frequently Asked Questions
How do I navigate between changes?
Use the ↑ and ↓ buttons in the output header, or press N for next change and Shift+N for previous. The counter shows your current position (e.g. "Change 3/12").
What is "Fold Unchanged"?
When enabled, unchanged lines are hidden and only ±3 context lines around each change are shown — exactly like git diff output. This makes large file diffs much more readable.