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.
1Open the Compare PDF tool.
2Choose your original (A) and changed (B) PDF.
3Click “Compare” to see highlighted differences and download a diff PDF.
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.
pdfcdf