Diff Checker
Compare two texts and see the differences online, free. Line-by-line added, removed and unchanged highlighting, 100% client-side.
How to use Diff Checker
- Paste the original text on the left.
- Paste the changed text on the right.
- Click "Compare" to see added (green), removed (red) and unchanged lines.
About Diff Checker
Diff Checker is a free Becoderr tool. It needs no sign-up, runs fast and privately, and works right in your browser for most tasks. For the few server-based tools, your files are processed in memory and discarded immediately after the operation.
Frequently asked questions
Is the comparison line-by-line?
Yes, it compares text line by line and highlights which lines were added, removed or kept.
Is my text uploaded?
No, the comparison runs entirely in your browser.
Is this tool free to use?
Yes. Every tool on Becoderr is completely free with no sign-up required. Signed-in users get higher file-size limits.
Are my files safe?
Yes. Browser-based tools process files entirely on your device; nothing is uploaded. Server-based tools process files in memory and discard them immediately after the operation.
Is there a file size limit?
Server-based tools accept up to 5 MB for anonymous users and 50 MB when signed in. Browser-based tools are limited only by your device.