How to compare two PDFs
Spot the differences between two versions of a PDF, page by page. pdfcdf highlights what changed in red so you can review edits at a glance — all processed locally.
Try Compare PDF now →Step by step
- 1Open the Compare PDF tool.
- 2Choose your original (A) and changed (B) PDF.
- 3Click “Compare” to see highlighted differences and download a diff PDF.
FAQ
How does the comparison work?
It renders both PDFs and compares them visually, tinting changed areas red. It’s a visual diff — great for spotting any change, from text edits to moved images.
Is pdfcdf free to use?
Yes. Every tool on pdfcdf is completely free, with no account, no watermarks, and no limits on how many files you process.
Are my files safe? Do they get uploaded?
Your files never leave your device. Every tool runs entirely in your browser, so your documents are processed locally and are never uploaded to a server or seen by anyone.
Do I need to create an account or sign up?
No. pdfcdf works instantly with no sign-up, no email, and no software to install — just open the tool and go.
Does it work on mobile phones and tablets?
Yes. pdfcdf runs in any modern browser on phones, tablets, Mac, Windows and Linux — nothing to download.
Ready to compare pdf?
Open Compare PDF →