Text Compare
Compare two texts and see exactly what was added, removed, or changed.
Paste an original and a changed version to see a clear, line-by-line comparison: additions are highlighted in green, deletions in red. Useful for proofreading edits, reviewing contract changes, spotting what moved between drafts, or checking copy revisions.
The comparison runs entirely in your browser, so even sensitive documents never leave your device.
Paste text into both panes to see a line-by-line comparison.
Private by design. Your text is processed entirely in your browser — it is never uploaded, logged, or stored on a server.
How the comparison works
VerbCount compares the two texts line by line using a longest-common-subsequence algorithm — the same approach behind developer diff tools. Lines that match are shown in muted text; lines only in the original are marked as removed; lines only in the changed version are marked as added. A line that was edited appears as a removal of the old line followed by an addition of the new one, which makes the exact change easy to see.
Because it works on whole lines, the cleanest results come from text that has natural line breaks — paragraphs, lists, code, or CSV rows. For a single long paragraph, the tool still works but will treat the whole paragraph as one line.
Common uses
Writers and editors use it to confirm which sentences changed between drafts. Legal and operations teams use it to review edits to terms, policies, or templates. Developers and analysts use it to compare config files, query results, or exported lists. The summary count of additions and removals gives you a quick sense of how big a change is before you read it line by line.
Examples
| Example | Input | Result |
|---|---|---|
| Edited line | color: blue → color: green | 1 removed, 1 added |
| Added line | Original + one new line | 1 added |
| Identical | Same text in both panes | Texts are identical |
Frequently asked questions
Is my text uploaded anywhere?
No. The entire comparison runs in your browser using JavaScript. Your text is never sent to a server, which means you can safely compare confidential documents.
Does it compare word by word or line by line?
It compares line by line. An edited line shows as the old line removed and the new line added, so you can see precisely what changed.
Can it handle large documents?
Yes. Very large inputs automatically switch to a faster comparison method so the page stays responsive.
Can I copy the result?
Yes. Use the “Copy diff” button to copy a unified diff (lines prefixed with + and −) to your clipboard.