Text Diff
Compare two blocks of text and highlight the differences. All processing happens in your browser.
🔒 Privacy First: All text comparison happens directly in your browser. Your text is never uploaded to any server.
How to Use
- Paste your original text in the left box
- Paste the modified text in the right box
- Choose your preferred diff mode (line, word, or character)
- View differences highlighted in green (added) and red (removed)
- Use the Copy Diff button to copy the comparison result
About Text Diff
A text diff (or "difference") tool compares two pieces of text and identifies what has changed between them. This is essential for code review, document revision tracking, contract comparison, and any situation where you need to spot changes between versions.
Our tool supports three comparison modes: line-by-line for general document comparison, word-by-word for prose editing, and character-by-character for precise technical comparison. The split view shows both versions side by side, while unified view combines them with inline highlighting.
Frequently Asked Questions
What is a text diff tool?
A text diff tool compares two blocks of text and highlights the differences between them. It shows additions, deletions, and changes, making it easy to see what has been modified between two versions of text.
Is my text data uploaded to any server?
No, our text diff tool processes everything in your browser using JavaScript. Your text never leaves your device, ensuring complete privacy for sensitive documents.
What's the difference between line-by-line and character-level diff?
Line-by-line diff compares entire lines and marks whole lines as added, removed, or changed. Character-level diff goes deeper, highlighting the specific characters that differ within each line for more precise comparison.
When should I use a text comparison tool?
Text diff tools are useful for comparing code versions, reviewing document changes, checking contract revisions, verifying configuration file changes, comparing API responses, and finding differences in any text content.
What do the colors in the diff output mean?
Green highlighting indicates text that was added (present in the second text but not the first). Red highlighting shows text that was removed (present in the first text but not the second). Yellow or gray may indicate unchanged context lines.
Can I compare large text files?
Yes, since processing happens in your browser, you can compare large text files limited only by your device's memory. There are no server-imposed file size limits.