Compare text.
Find every change.
A fast, accurate diff checker. No sign-up, no uploads — all processing stays on your device. Compare code, documents, or any text side-by-side.
Why Diff Checker?
Everything you need, nothing you don't.
100% Private
Your text never leaves your device. All comparison happens client-side. No server, no logs, no tracking.
Instant Results
Auto-compare as you type. Real-time diff highlighting with zero latency. No page reloads needed.
4 View Modes
Inline, Line-by-Line, Word Diff, and Side-by-Side. Choose the view that fits your workflow best.
File Upload
Upload .txt, .md, .json, .csv, .xml, .log files. Supports all common text formats.
Detailed Stats
See characters added/removed, similarity percentage, and change count at a glance.
Keyboard Shortcuts
Ctrl+Enter to compare. Full keyboard navigation support. Built for power users.
How It Works
Three simple steps to compare any text.
Paste or upload your texts
Enter two versions of text in the side-by-side panels above. Or upload files directly.
Choose your view
Switch between Inline, Line-by-Line, Word Diff, or Side-by-Side views to see differences your way.
Review the results
Added text in green, removed text in red. Stats show exact changes.
Who Uses Diff Checker?
Built for anyone who works with text.
Developers
Quick diff checks on code, config files, and logs. Compare commits and track changes.
Writers & Editors
Track document revisions. Spot edits between drafts. Verify proofreading changes.
Students
Compare essay drafts. Check citations. Review revisions before submission.