How to Use the Diff Checker
Compare text and code in seconds with our powerful, privacy-first diff tool. Follow these simple steps to get started.
Paste Original Text
Copy your original text or code and paste it into the left textarea. This will be your baseline for comparison.
Paste Modified Text
Paste the modified version into the right textarea. The tool will automatically detect the changes.
View Differences
Instantly see all changes highlighted with character-level precision. Green shows additions, red shows deletions.
Choose View Mode
Switch between Side-by-Side for layout comparison or Unified view for traditional diff format.
Expand for Details
Click "Expand View" for a larger modal to analyze extensive changes with better visibility.
Review Statistics
See instant stats showing total additions and deletions to understand the scope of changes.
Key Features
100% Client-Side & Secure
All text comparison happens in your browser. Your data never leaves your device, ensuring complete privacy and security.
Character-Level Precision
See exactly which characters changed within a line, just like GitHub and GitLab diffs.
Dual View Modes
Choose between Side-by-Side for layout comparison or Unified view for traditional git-style diffs.
Lightning Fast
Optimized performance handles large files without lag. No server delays, instant results.
Common Use Cases
Code Review
Compare different versions of source code to track changes during development.
Document Editing
Track changes in articles, contracts, or any written content.
Configuration Files
Identify differences in config files, JSON, XML, or YAML documents.
Data Analysis
Compare datasets, logs, or CSV files to spot discrepancies.
Version Control
Understand git diffs or changes between file versions.
Quality Assurance
Verify content changes and ensure accuracy in translations or updates.
Why Choose Our Diff Checker?
Our secure diff tool prioritizes your privacy and performance. Unlike online services that upload your files to remote servers, our tool performs all text comparison operations directly in your browser using client-side JavaScript.
Your sensitive code or documents never leave your device
Zero logging or tracking of your content
No network delays, instant results
Functions offline once the page is loaded
No registration or subscription required
Transparent, trustworthy, and community-driven
💡 Pro Tips for Best Results
📋Consistent Formatting
Ensure both texts are formatted consistently with the same line breaks and indentation for accurate comparison.
👁️Choose Right View
Use Side-by-Side for structural changes and Unified view for detailed line-by-line analysis.
⚡Handle Large Files
For very large files, consider comparing sections at a time for optimal performance.
🔤Whitespace Matters
The tool preserves whitespace, so spaces and tabs are treated as significant differences.