Catch the changes nobody told you about
A contract comes back “with small adjustments”. A colleague edits your report. A terms-of-service page gets updated. Reading both versions side by side, it's easy to miss one changed number or one removed sentence — and that's often the one that matters. The comparison shows every difference in color.
Words or lines
- Words — best for contracts, essays and articles: shows exactly which words changed inside a sentence.
- Lines — best for lists, data and code: shows which whole lines were added or removed.
You can ignore case and extra spaces so formatting noise doesn't hide real changes.
Private by design
Many online diff tools send your text to their server. Contracts, medical letters and unpublished work shouldn't go there. Here the comparison runs entirely in your browser.
Frequently asked questions
Can I compare Word or PDF files?
Copy the text from each file and paste it here. Plain text files (.txt, .md, .csv) can be opened directly.
Is there a size limit?
Long documents work fine. Extremely different texts are shown as a full replacement to keep the page fast.
What does similarity mean?
The share of words (or lines) the two versions have in common.