Compare PDFs like a pro

PDF Differ is a Mac app intended for designers, editors and art directors who need to compare PDFs quickly and easily. With both rasterization and text comparison modes, you can be sure that every detail is covered.
Download a free beta version. (Mac OS 11+)
Say goodbye to the limitations of existing comparison tools! PDF Differ can compare PDFs with different paper sizes, ignore printer's marks and compare spreads against pages.

Ignore printer's marks

Easily compare original artwork against prepress proofs which contain bleed, trim and registration marks. PDF Differ will automatically calculate the offset needed in order to align the content of both pdfs perfectly.

Compare single pages against spreads

Compare single pages against spreads: Print shops will often provide proofs which have been exported as single pages, while the approved artwork may have been exported as spreads.

Rasterization modes

The animated view makes spotting low resolution images and small changes easier than ever. The overlay view allows users to spot elements which may have been moved accidently.

Text mode

Quickly find the textual differences between two PDFs, while ignoring the formatting and text reflow of each document. Releasing a 2nd edition of a popular book with an updated design? no problem. PDF Differ will highlight only the text which has changed. Users can click on text changes and the relevant PDF page will be displayed.

We're just getting started

PDF Differ has been developed in collaboration with leading art directors. Our aim is to produce tools which provide peace of mind when signing off large print runs and to ensure that nothing is left to chance.
The app is currently under active development so we're looking for more beta testers.

Testimonials

PDF Differ automates the quality control process, and makes finding mistakes as effortless as a click. At this point it's an essential part of my team's process.
Brian LaRossa, Executive Art Director.