Text Diff
Compare two texts and find the difference at character, word, or line level. A free online text difference checker with add/delete highlighting.
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How to Use
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- 1
Enter two texts
Enter the texts you want to compare in the 'Original' and 'Modified' areas.
- 2
Select comparison mode
Choose from 'Character', 'Word', or 'Line' mode based on your needs.
- 3
Review diff results
Additions are underlined, deletions are struck through. Check the change statistics for add/delete counts.
About Text Diff
Text Diff lets you compare two texts online and instantly find every text difference at the character, word, or line level. Whether you're proofreading article drafts, reviewing code changes before a commit, comparing contract revisions, or verifying translation accuracy against the original, this free text difference checker makes every addition, deletion, and modification visible at a glance. Additions are highlighted with a green underline, deletions with red strikethrough, and detailed statistics show exactly how many characters, words, or lines were changed. The swap button reverses the comparison direction, and the real-time string diff updates as you type. All processing runs entirely in your browser, so you can safely compare confidential documents, source code, or any two strings without uploading anything to a server.
Key Features
- Compare two texts at character, word, or line level
- Additions shown with underline, deletions with strikethrough
- Change statistics showing add/delete counts
- Swap texts feature to reverse comparison direction
- Real-time text diff updates as you type
- Browser-only string diff, no upload
Use Cases
- Compare two texts to find the difference between draft versions
- Review code changes and string diffs before committing
- Check what changed between contract revisions
- Verify translation accuracy against the original text
- Compare CSV or configuration file changes line by line
- Spot differences between AI-generated outputs
FAQ
What types of differences are detected?
The tool detects additions, deletions, and modifications. You can compare at the character, word, or line level depending on your needs.
Can I compare code with this tool?
Yes, but for code with syntax highlighting, try our Code Diff tool instead. Text Diff is ideal for plain text, documents, and prose.
Is there a size limit?
The tool handles texts up to 100,000 characters each. For very large files, consider splitting them into sections.
How are additions and deletions displayed?
Added parts have a green background with underline. Deleted parts have a red background with strikethrough. Changes are visible at a glance.
Is my text sent to any server?
No, all processing is done locally in your browser. You can safely compare confidential documents.
How do I find the difference between two texts?
Paste the original text into the left panel and the modified text into the right panel. The text diff result appears instantly with additions underlined in green and deletions struck through in red. Choose character mode for precise edits, word mode for prose comparison, or line mode for configuration files and source code. Use the swap button to reverse the comparison direction.
Can I compare two texts longer than a few paragraphs?
Yes. The tool handles up to 100,000 characters per text panel, so you can compare entire articles, contracts, or long configuration files. For very large files exceeding the limit, split them into smaller sections and run the text difference check on each section separately.