Text Compare Pro
The editorial-grade diff for prose and code. Find every chnage change in seconds — beautifully highlighted, entirely in your browser.
Built for careful reading
The most considered text comparison tool, with features designed for developers, writers, and professionals
Multiple Diff Algorithms
Compare by lines, words, characters, or sentences with intelligent diff algorithms
Format Aware
Work with JSON, JavaScript, Python, SQL and more — with automatic JSON and SQL formatting
Real-time Comparison
Instant visual feedback with side-by-side comparison, synchronized scrolling, and diff navigation
Editorial Design
A calm ink-and-paper interface that keeps your eyes on the text, in light and dark mode
High Performance
Optimized for large texts with precise line alignment and efficient diff computation
Privacy First
All comparisons happen locally in your browser - no data sent to servers
Three steps to clarity
Simple, powerful, and intuitive text comparison
Paste Your Texts
Simply paste or type your original and modified texts into the input areas
Choose Options
Select diff mode, formatting, and comparison options like ignore case
View Results
See highlighted differences with statistics and navigate through changes
Frequently asked questions
Everything you need to know about Text Compare Pro
What makes Text Compare Pro different from other diff tools?
Text Compare Pro offers advanced features like multiple diff algorithms, support for 10+ formats, real-time formatting, and performance optimization for large texts. Its calm, editorial interface keeps the focus on your text.
Is my text data secure?
Absolutely! All text comparison happens locally in your browser. We never send your data to any servers, ensuring complete privacy and security.
What file formats are supported?
Text Compare Pro supports plain text, JSON, JavaScript, TypeScript, Python, SQL, Java, C#, HTML, CSS, and more. You can paste any text content and apply appropriate formatting.
Can I compare large files?
Yes! Our tool is optimized for performance with features like context folding and efficient diff algorithms that handle large texts smoothly.
How do the different diff modes work?
Lines mode compares line by line (best for code), Words mode highlights word changes (great for documents), Characters mode shows every character change, and Sentences mode is ideal for prose.
Can I ignore case or whitespace differences?
Yes, you can toggle options to ignore case sensitivity and whitespace differences, making it easier to focus on meaningful changes.