Code Diff Checker
Compare two blocks of code side by side with added/removed line highlighting.
🔒 No uploads⚡ Instant🆓 Free
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How It Works
1
Paste the original code on the left.
2
Paste the modified code on the right.
3
View added, removed, and unchanged lines.
Features
✓Line-by-line diff comparison
✓Color-coded additions and removals
✓Line number display
✓Handles large files efficiently
✓No data leaves your browser
✓Works with any programming language
Frequently Asked Questions
What diff algorithm is used?▼
We use a longest common subsequence (LCS) based algorithm to find the minimal set of changes between the two inputs.
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