Does it compare how the pages look?

No — it compares the text. That is deliberate: a document re-exported from a different program can look different on every page while saying exactly the same thing, and a pixel comparison would flag all of it as changes.

My documents are scans and nothing was found.

A scan has no text to compare, only an image of text. Run OCR on both first, then compare the results.

Are both documents uploaded?

No. Both are opened and compared with nothing sent anywhere. Comparing two versions of a confidential contract is exactly the case where that matters.

Compare PDFs

See exactly which lines changed between two versions.

Zero-transmission processing
No watermark
Limited daily trial
Unlimited on Pro

Drop your PDFs here

or pick them from your device

Your files are never transmitted. Nothing is uploaded.

Good to know

Accepts: PDF
Files at once: 2 or more
Transmission: None — nothing is uploaded.

Chain it

Run this tool and the next one back to back — nothing to download in between.

Build a workflow

How to do it

1
Add your file
Add two PDFs — the older version first, then the newer one. Neither is modified and neither is transmitted.
2
Set it up the way you want
Nothing to configure. The text of both documents is extracted and compared, so you are comparing what the documents say rather than how the pixels look.
3
Download the result
Download the report. It lists what was added, what was removed and where, so you can see what actually changed between two versions of a contract.

Questions about Compare PDFs

Does it compare how the pages look?: No — it compares the text. That is deliberate: a document re-exported from a different program can look different on every page while saying exactly the same thing, and a pixel comparison would flag all of it as changes.
My documents are scans and nothing was found.: A scan has no text to compare, only an image of text. Run OCR on both first, then compare the results.
Are both documents uploaded?: No. Both are opened and compared with nothing sent anywhere. Comparing two versions of a confidential contract is exactly the case where that matters.