Diff Formatter
Compare text and code differences with formatted highlighting and side-by-side view
Original
Modified
Diff Result
Tips
- Enter the original text on the left and the modified text on the right
- Click "Compare" to see line-by-line differences
- Green lines = additions Red lines = removals Gray lines = unchanged
- Use "Swap" to swap the original and modified inputs
Professional Diff Processing Features
Everything you need to work with Diff data efficiently and professionally
Accurate Comparison
Uses the Myers diff algorithm for precise line-by-line comparison with minimal edit distance.
Color Highlighting
Green for additions, red for removals, with character-level highlighting within changed lines.
Unified Diff
Generate standard unified diff output compatible with patch tools and version control systems.
Swap & Reverse
Easily swap original and modified texts to view the comparison from either direction.
Fast Processing
Compare large texts up to 10MB instantly with client-side processing — no server round-trips.
Dual Input
Two side-by-side input areas for easy comparison with line numbers and clear labeling.
How It Works
Simple steps to process your Diff like a pro
Enter Original
Paste the original text or code into the left input area.
Enter Modified
Paste the modified text or code into the right input area.
Compare
Click the compare button to see all differences highlighted with color coding.
Review & Copy
Review the highlighted differences and copy the unified diff output if needed.
Professional Diff Formatter & Validator
Trusted by millions of developers worldwide for reliable Diff processing
Built by Experts
Our diff formatter is developed by experienced engineers with deep expertise in text comparison algorithms. Built using the Myers diff algorithm, it delivers accurate and readable results every time.
Key Technical Features:
- • Myers diff algorithm for accurate comparison
- • Line-by-line and word-level diff highlighting
- • Character-level change detection within lines
- • Client-side processing for maximum security and speed
- • Support for large text comparisons up to 10MB
Trusted & Secure
Trusted by developers at Fortune 500 companies, government agencies, and educational institutions worldwide. Our commitment to privacy means your text data never leaves your browser.
Security & Privacy:
- • 100% client-side processing - data never sent to servers
- • No tracking, cookies or data collection
- • HTTPS encryption for secure connections
- • No data stored or cached after processing
- • GDPR and CCPA compliant approach
Why Professionals Choose EZ Formatter
Join millions of developers who trust our Diff formatter for their daily development workflow. No registration required, completely free, and built with privacy in mind.
Frequently Asked Questions
Common questions about Diff Formatter formatting answered
Yes, our diff formatter is completely free with no registration required. All processing happens in your browser.
You can compare any text content: code, configuration files, JSON, XML, plain text, or any other text-based format.
Added lines are shown with a green background, removed lines with a red background, and changed lines show both versions side by side.
Yes. Click the swap button to reverse the original and modified texts, turning additions into removals and vice versa.
The tool uses the Myers diff algorithm, which is the same algorithm used by Git for text comparison, ensuring accurate and minimal diffs.