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Diff Checker

Compare two texts or code files to identify differences. Generate professional diff outputs in multiple formats with detailed statistics and analysis.

Original Text (OLD)

Enter the original/old version of your text or code

New Text (NEW)

Enter the new/updated version of your text or code

Diff Format Guide

Symbols
+ Added lines
- Removed lines
Unchanged lines

Quick Format

Output

Output will appear here

How It Works

Input Your Data

Paste, type, or upload your data directly into the diff checker. All processing happens locally in your browser for complete privacy and security.

Configure Options

Customize the tool settings to match your specific needs. Real-time processing with instant validation and error detection.

Process Instantly

Click the process button or enable auto-processing for real-time results. Lightning-fast performance with immediate feedback and validation.

Export Results

Copy results to clipboard, download as files, or share with others. Multiple export formats available for maximum compatibility.

Frequently Asked Questions

What's the difference between unified, split, and inline diffs?
Unified shows changes in a single column with +/- prefixes (like Git). Split shows old and new side-by-side. Inline shows changes in sequence with clear indicators.
How does the similarity percentage work?
Similarity is calculated as the percentage of unchanged lines compared to total lines. Higher percentages indicate more similar content.
Can it ignore whitespace and case differences?
Yes, enable "Ignore Whitespace" to treat spacing changes as identical, and "Ignore Case" for case-insensitive comparison. Useful for comparing code with different formatting.
What is JSON comparison mode?
JSON mode parses both inputs as JSON and compares the structure, showing added/removed/changed properties rather than line-by-line text differences.
How do context lines work in unified diff?
Context lines show unchanged content around changes to provide context. More context lines help understand the change location but create longer output.

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