Compare two pieces of text and spot the differences line by line. Paste your original and revised text, then click Compare to see what changed, with additions and removals highlighted.
How to Use
- Paste the original version of your text into the Original text box.
- Paste the revised version into the Revised text box.
- Click Compare to see a line-by-line breakdown of every difference.
- Use Clear to reset both boxes.
Key Features
- Line-by-line comparison — every line is matched against the other text for a precise result.
- Colour-coded changes — removals in red, additions in green, unchanged lines in grey.
- Change summary — total counts of unchanged, added and removed lines.
- Identical-text detection — get a clear message when nothing changed.
- Private — everything runs in your browser.
FAQs
How does the comparison work?
The tool splits both texts into lines and uses a longest-common-subsequence algorithm to align matching lines. Anything left over is shown as a removal from the original or an addition in the revised text.
Can I compare long documents?
Yes, each text can be up to 1000 lines for a quick comparison. Longer texts should be split into sections for the best experience.
Does it compare word by word?
No — comparison is line by line. For fine-grained edits, keep your line breaks in the same places in both texts.
Is my text sent anywhere?
No. All comparison happens locally in your browser.