Text Diff Tool
Compare two texts and instantly see the differences highlighted. Perfect for code review, document comparison, and version control.
About Our Text Diff Tool
Our free online text comparison tool helps you identify differences between two text documents quickly and accurately. Whether you're comparing code versions, document revisions, or any text content, this tool highlights additions, deletions, and changes with color-coded visual cues.
The text diff tool is particularly useful for:
- Developers reviewing code changes and merges
- Writers tracking document revisions and edits
- Students comparing different versions of essays
- Legal professionals examining contract changes
- Content managers verifying website updates
- Anyone needing to spot differences in text files
Comparison Methods
Line-level Comparison
Compares entire lines of text, ideal for code and documents where changes typically affect whole lines.
Word-level Comparison
Highlights changes at the word level within lines, perfect for prose and content editing.
Character-level Comparison
Shows exact character differences, useful for precise analysis of small changes.
Customizable Options
Toggle case sensitivity, whitespace handling, and whether to show matching lines.
How to Use This Tool
- Paste your original text in the left box
- Paste the modified text in the right box
- Select your preferred comparison method (line, word, or character level)
- Set additional options (case sensitivity, whitespace, etc.)
- Click "Compare Texts" to analyze differences
- Review the color-coded diff output and statistics
- Use "Swap Texts" to reverse the comparison if needed
Understanding the Results
The diff output uses color coding to highlight different types of changes:
- Green (Added): Content that exists in the modified text but not in the original
- Red (Removed): Content that exists in the original but not in the modified text
- Yellow (Changed): Content that has been modified between versions
- Statistics: Shows counts of additions, deletions, changes, and overall similarity percentage
Frequently Asked Questions
Line-level compares whole lines, word-level compares individual words within lines, and character-level shows exact character differences. Choose based on your needs - line-level is best for code, word-level for documents, and character-level for precise analysis.
The similarity percentage is based on the ratio of matching content to total content. At line-level it compares lines, at word-level it compares words, and at character-level it compares individual characters.
The tool can handle reasonably large texts (up to about 100,000 characters per box). For very large files, we recommend splitting them into smaller chunks or using specialized desktop diff tools.
No, all processing happens in your browser. We never send your text to our servers, ensuring complete privacy for your content.
You can copy the results (with formatting) to your clipboard, or use your browser's print function to save as PDF. We may add export options in future versions.