How to use this tool
Paste an original version on the left and a revised version on the right. Click Compare to see added and deleted lines, with an overview of how many lines were unchanged.
Quick steps
- Paste the original text and your edited version into the two boxes.
- Choose Compare to highlight added, removed and unchanged lines.
- Review the summary and copy it if needed.
Practical tip
This compares lines rather than individual words. Large files should use a dedicated version-control diff; this lightweight tool supports up to 200 lines per side.
Common questions
Does it compare words or lines?
It compares full lines using an alignment algorithm, identifying which lines were added or removed.
Are my texts uploaded?
No. Your text remains in the browser and is not sent to PackFormulas.
Can it compare two enormous documents?
For performance, this browser utility limits each version to 200 lines and 20,000 characters.