Slop Compare · free, in your browser

Compare two texts and see what changed

Two versions of a contract, an essay or a piece of code: paste them side by side and Slop Compare marks every change, down to the word.

How to do it

Paste or type the original text in A, and the changed text in B. You can also drop a file on each side.
Choose Compare. Removed lines are red, added lines green, and the words that changed inside a line are marked darker.
Use Next and Previous (or F7 and Shift+F7) to go from one change to the next.
Switch between Side by side and Unified in the panel, and tick Ignore whitespace or Ignore case when those do not matter.
Choose Export to download the report as HTML or PDF, or a .patch of the change.

Your files stay on this device: Slop Compare runs in your browser, with no upload, no account and no watermark.

No. Both files are read by the page in your browser and never leave your device.

Yes. JavaScript, Python, HTML, CSS, SQL and other text files compare line by line, and a .patch is written as diff -u and git diff write it.

Files up to 30 MB of text. Very different long files are compared in one block, so the result stays quick.

Three lines around each change; longer unchanged runs fold into one line you can click to open.

File convert
In development
Images, PDFs, data and text, converted on your device.
Slop PDF
Live
Organise, edit and sign PDFs. Nothing uploaded.
Slop OCR
Beta
Read text from images and scanned PDFs on your device. Nothing uploaded.