Free Text Diff Checker - Compare Two Text Files Online

Compare text online instantly with our free text diff tool. Find differences between documents, code files, and text content with real-time highlighting. Perfect for developers, writers, and content creators.
Browser-based text comparison using advanced algorithms to identify changes, additions, and deletions. No registration required - paste text and get instant visual results.

🚀 Key Features

Smart Text Comparison

Real-time difference detection with Myers diff algorithm
Support for large files and character/word/line-level comparison
Color-coded highlighting: green (added), red (deleted), yellow (modified)
Side-by-side view with synchronized scrolling and mobile support

Professional Tools & Privacy

File upload with drag-and-drop, one-click merge functionality
Export results in multiple formats with keyboard shortcuts
Complete privacy: all processing happens in your browser
No registration required, works on all modern browsers

💼 Use Cases

Software Development: Code comparison, Git diff visualization, configuration review Content & Documentation: Document versions, collaborative writing, translation review
Professional: Legal contracts, academic manuscripts, business document analysis

🎯 Why Choose Our Tool?

Fast & Accurate: Instant results, handles large files, precise detection Private & Simple: Clean interface, local processing, no registration, HTTPS secure

🚀 How to Use

Paste or type text into left and right panels
Click "Compare" to see highlighted differences
Use merge buttons to combine changes
Export results or copy final text

Pro Tips: Enable auto-compare, upload large files directly, use keyboard shortcuts, ignore whitespace for code.

🔧 Technical Details

Myers diff algorithm, all modern browsers support
No file size limits, UTF-8/UTF-16/ASCII encoding
WCAG 2.1 AA compliant, responsive design
Statistics: lines added/deleted, similarity percentage
Export to text/HTML/PDF, customizable themes

Start using our free text diff checker - Compare documents and code instantly with professional accuracy.