Text Diff Checker
Compare two texts, in a single list or side by side, with changes highlighted. Everything runs in your browser, so your input isn’t uploaded.
How to use the Text Diff Checker
- Paste the original text on the left and the changed text on the right, or select Load sample.
- Select Compare.
- Read the result in a single list or side by side. Use Swap to compare in the other direction.
Example
Compare a short list before and after an edit. “banana” was replaced, and “date” was added at the end. Lines marked − were removed, and lines marked + were added.
Original: apple banana cherry Changed: apple blueberry cherry date
apple − banana + blueberry cherry + date
About this tool
A diff shows the differences between two versions of a text. This tool compares the two boxes line by line, then lists every line as added, removed or unchanged, with line numbers from both versions. In side-by-side view, the part of each line that changed is highlighted.
Good to know
- The comparison works on whole lines. In side-by-side view the changed part of each paired line is also highlighted.
- Line endings (Windows or Unix) and one final newline are ignored.
- Very large texts are refused with a message rather than freezing your browser.
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