Compare files and folders online — fast and clean
Twofold is a powerful, privacy-first file comparison tool that runs entirely in your browser. No uploads, no installs, completely private by design.
Left
Select folder to start comparison
or drag and drop a file/folder here
Right
Select folder to start comparison
or drag and drop a file/folder here
Meet our most popular features for smooth comparisons
Twofold provides everything you need for accurate, fast, and private file comparisons
Folder Comparison
Deep recursive folder scanning with smart file matching, rename detection, and detailed change reports.
- Recursive directory scanning
- Smart file matching & rename detection
- Virtual scrolling for large projects
Text Diff Engine
Advanced text comparison with line, word, and character-level granularity. Perfect for code reviews.
- Line/word/character granularity
- Syntax highlighting support
- Ignore whitespace & case options
Advanced Comparison
Powerful comparison capabilities for understanding complex changes and differences between files.
- Detailed change analysis
- Side-by-side comparison
- Interactive diff interface
Privacy First
Files never leave your device
Lightning Fast
Web Workers for performance
PWA Ready
Works offline after first load
Secure
No data collection or tracking
Perfect for every comparison need
Whether you're a developer, designer, or content creator, Twofold has you covered
Code Reviews
Compare code changes, review pull requests, and understand modifications with precision.
Design Assets
Compare design files, track changes in mockups, and ensure consistency across versions.
Documentation
Track changes in documentation, compare different versions, and maintain accuracy.
Ready to start comparing?
Join thousands of developers and creators who trust Twofold for their file comparison needs.