Text Diff Viewer
Compare two texts side by side and instantly identify additions, deletions, and changes. Perfect for code review, document versioning, and content comparison.
Differences Viewer (Diff)
💡 How to use:
Paste the original text in the first field and the modified text in the second. The diff will show the differences line by line.
🎨 Color legend:
• Green: Added lines
• Red: Removed lines
• Gray: Equal lines
What is a Text Diff Viewer?
A text diff viewer is a tool that compares two versions of text and highlights the differences between them. It's an essential tool for developers, writers, and anyone who needs to track changes between versions of documents or code.
Common Use Cases
- Code Review: Compare code changes before merging pull requests
- Document Editing: Track changes between drafts and revisions
- Version Control: View git diff output in readable format
- Contract Analysis: Identify changes between contract versions
- Configuration Files: Compare configurations across environments
- API Responses: Detect changes in JSON/XML responses
Diff Algorithms
Modern diff viewers use sophisticated algorithms to identify differences:
- Myers Algorithm: The most common approach, used by Git and most diff tools
- Patience Diff: Better for code with many unique lines
- Histogram Diff: Fast and accurate for most real-world scenarios
- Line by Line: Simple comparison based on entire lines
- Character by Character: More granular, shows exact character changes
Understanding Diff Output
+ Green lines: Added in the new version
- Red lines: Removed from original
Gray lines: Unchanged context
Tips for Effective Comparison
- Normalize whitespace if indentation differences aren't important
- Use case-insensitive mode for text where capitalization doesn't matter
- Compare files with similar structure for better diff accuracy
- Break large texts into sections for easier analysis
- Use unified diff format for version control submissions
- Review context lines to understand the scope of changes
Diff in Version Control
Diff tools are integral to version control systems like Git. Common git diff commands include:
Privacy and Security
This tool runs entirely in your browser. No text is sent to any server, ensuring that your sensitive documents, code, and data remain completely private and secure.