Text Diff Checker
Use our free text diff checker to compare two texts and find differences instantly. View unified diff, context diff, or HTML diff - perfect for code reviews and document comparison.
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About Text Diff Checker
Our free online text diff checker helps you compare two versions of text and find differences instantly. Whether you're reviewing code changes, comparing documents, or tracking edits, this text diff checker makes it easy. For other text tools, check out our Text Tools category.
A text diff (difference) shows the changes between two versions of text, highlighting what was added, removed, or modified. This is essential for code reviews, document version control, and tracking changes. Our text diff checker supports multiple diff formats including unified diff (standard format), context diff (shows surrounding lines), and HTML diff (color-coded for easy viewing). For text analysis, try our Word Counter.
Key Features:
- Compare two texts - Side-by-side comparison of any text content
- Multiple diff formats - Unified diff, context diff, or HTML diff
- Color-coded HTML diff - Easy-to-read visual comparison
- Statistics - See lines added, removed, and similarity percentage
- Line-by-line comparison - Detailed difference analysis
- Completely free - No registration, no limits
How to Compare Two Texts
- Paste or type the original text in the first text area
- Paste or type the modified text in the second text area
- Select the diff format: unified (standard), context (with surrounding lines), or HTML (color-coded)
- Click "Compare Texts" to generate the diff
- Review the diff output showing added (green), removed (red), and changed lines
- Check the statistics for lines added, removed, changed, and similarity percentage
- Copy the diff output if needed for documentation or sharing
Learn more: According to Wikipedia's article on diff , a diff is a file comparison utility that outputs the differences between two files. It was originally developed for Unix and is now widely used in version control systems like Git.
Text Diff Use Cases
Code Reviews
Compare code changes before merging pull requests
Document Comparison
Compare different versions of documents and track changes
Content Editing
Track edits and changes in content revisions
Debugging
Compare configuration files and identify changes
Frequently Asked Questions
Is the text diff checker free to use?
Yes, our text diff checker is completely free to use. No registration or payment required.
What is a text diff?
A text diff (difference) shows the changes between two versions of text, highlighting what was added, removed, or modified.
What diff formats are supported?
We support three diff formats: unified diff (standard format), context diff (shows surrounding lines), and HTML diff (color-coded for easy viewing).
Can I compare code files?
Yes, you can paste code from any programming language and compare it. The diff checker works with any text content.
What does similarity percentage mean?
The similarity percentage shows how similar the two texts are, calculated using sequence matching algorithms. 100% means identical, 0% means completely different.
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