Text Compare
Compare two texts instantly — side-by-side or unified diff, with next/prev jump and change counts. Nothing uploads.
Paste an original and a changed version and this tool runs a line-based diff in your browser, then gives you two things most online diff tools skip: a change count (for example "3 additions, 2 deletions") and next/prev buttons that jump straight to each change.Nothing is uploaded — the comparison is pure in-browser computation. That means it works on confidential drafts, contracts, and unpublished manuscripts you would never paste into a server-side tool.
Original
Changed
0 ADDITIONS
0 DELETIONS
Frequently asked questions
Is my text uploaded when I compare?
No. The comparison runs entirely in your browser with a fast line-based diff. You can go offline after the page loads and it keeps working.
What is the difference between the two views?
Side-by-side shows the original and changed text in two columns, aligned line by line. Unified shows one merged column with deletions and additions inline — the format used by git.
How large a file can I compare?
The tool compares comfortably up to roughly 1,000 lines on each side. Larger pastes get an honest notice instead of a frozen tab — split the file into chunks to compare more.
Can I ignore formatting differences?
Yes. The ignore-case and ignore-whitespace options skip case changes and extra spaces when matching lines, so you see only substantive edits.