Diff Checker - Free Online Tool | PivaBox

Compare two texts side by side with added and removed lines highlighted

How to Use Diff Checker

1. Paste the original text in the left panel and the modified text in the right panel
2. The tool automatically compares the texts line by line
3. Added lines appear highlighted in green and removed lines appear in red, with stats below

Frequently Asked Questions

Is Diff Checker free?

Yes, PivaBox Diff Checker is completely free to use. All comparison is done in your browser.

Are my texts uploaded to a server?

No. All text comparison is done locally in your browser using the diff library. Your data never leaves your device.

What type of diff algorithm does it use?

The tool uses line-by-line diff comparison, which is ideal for code and structured text. It shows clearly which lines were added, removed, or modified. The diff output includes line number references and summary statistics for quick assessment of the total changes.