Features & Tips
Syntax Highlighting
Automatically highlights syntax for JS, Python, CSS, JSON, and more to make code diffs readable.
Word-Level Diff
Pinpoints exactly which words or characters changed within a line, not just the whole line.
Private
Comparison happens entirely in your browser using JavaScript. No data leaves your device.
Frequently Asked Questions
What is a Diff Checker?
A diff checker highlights the differences between two text sources. It is commonly used by developers to see code changes, or writers to track edits.
How do I use the "Side-by-Side" view?
After clicking "Compare", toggle the view mode button at the top of the results section to switch between Inline (stacked) and Side-by-Side (split) layouts.
Is my code safe?
Yes. This tool runs 100% client-side. Your code or text is processed locally in your browser and is never uploaded to any server.