See exactly what was added, removed or left unchanged between two texts, with optional case and whitespace matching.
Paste both versions, read the diff.
Paste the original text into the left box, the changed text into the right.
The diff updates live — green lines were added, red lines were removed.
Optionally ignore case or trailing whitespace.
Read the summary: exact counts of added, removed and unchanged lines.
Built for speed, privacy and reliability — on any device.
Added, removed and unchanged lines are colour-coded exactly like a code review.
Ignore case or trailing whitespace when the difference is only about meaning.
A summary counts added, removed and unchanged lines as you type.
The diff runs locally — your text never leaves your device.
No account, no limits.
Every line from both texts: green + lines exist only in the changed text, red − lines only in the original, and unchanged lines in between.
Yes — any text up to 3000 lines per side, including code, configs, lists and prose.
It treats lines that differ only by spaces at the end as identical — useful for copied text.
No. The comparison runs entirely in your browser.
The tool works in all modern browsers including Google Chrome, Mozilla Firefox, Microsoft Edge, Safari and Opera. We recommend keeping your browser up to date for the best experience.
Step-by-step guide with screenshots and tips.
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