DevTools / Text
Diff Checker
Paste two versions of a text and instantly see what was added, removed, or unchanged, line by line.
Runs entirely in your browser · No data uploaded
What is Diff Checker?
This tool compares two blocks of text using a line-based diff algorithm, highlighting lines that were added (green) or removed (red) so you can quickly spot changes between two versions of code, config, or content.
FAQ
Does it diff word-by-word?
No, this is a line-by-line diff — useful for comparing whole lines of code, text, or config changes.
Is my text sent anywhere?
No, the comparison runs entirely in your browser.