Code Diff Checker

What is Text Diff Checker?

The Text Diff Checker is a powerful comparison utility that allows developers, writers, and content creators to visually identify differences between two blocks of text or code. Whether you're reviewing code changes, comparing document versions, or analyzing configuration differences, this tool provides a clear, color-coded side-by-side view of additions, deletions, and unchanged content.

Built specifically for developers who need to understand changes in source code, the diff checker uses the proven JSDiff algorithm to create accurate comparisons. It highlights modified lines in context, making it easy to understand exactly what changed and where. All processing happens locally in your browser, ensuring that sensitive code or documents remain private and secure.

How to use Text Diff Checker

1. Paste original text - Enter the first version of your text in the left panel
2. Paste modified text - Enter the second version of your text in the right panel
3. Click compare - The tool instantly highlights all differences between the two versions

Key Features

• Visual highlighting - Color-coded display of additions (green) and deletions (red with strikethrough)
• Side-by-side view - Compare long texts comfortably without scrolling horizontally
• Developer-focused - Optimized for code comparison with monospace fonts and syntax awareness
• Privacy-first - All comparison happens client-side, no data leaves your browser
• Context preservation - Shows surrounding unchanged lines for better understanding of changes
• Real-time updates - See differences update instantly as you type or paste content

Frequently Asked Questions

Can I compare large files?
Yes! The tool handles large text blocks efficiently, though for very large files (over 1MB), the browser may become slower. For best performance, consider comparing files in smaller sections or using dedicated diff tools for extremely large codebases.