byADIT Free software for engineers and students
EngiFree

diff-pdf

Vaclav Slavik

diff-pdf

A small tool for visually comparing two PDF files. You can open a graphical viewer that overlays both files with the differences highlighted and zoom, produce a PDF in which the changes are marked, or use it on the command line just to report whether the files are identical. Suited to a quick check of what changed between revisions of a drawing or report. The comparison is of appearance only, not of the text.

Ratings & Reviews

No reviews yet for this program. If you have used it, your rating will help the next engineer.

Add a rating

Reviews are checked before publication. A review that is not based on genuine use of the software will not be published.

Licence typeCompletely Free, Open Source
Licence termsOpen-source licence (GPL-2.0). Free for any purpose including commercial work, with no time limit, no registration and no licence key. The developer states the code is provided as-is and is not under active development.
PlatformsLinux, macOS, Windows
Engineering fieldArchitecture, Civil Engineering, Electrical & Electronics, Mechanical Engineering
Tool typeGeneral Productivity
Vendor sitevslavik.github.io
Official download page

This link goes to the vendor site. EngiFree hosts no installers and distributes no cracked versions.

Last verified: 2026-10-05

More tools in the same field

Know a similar tool that is missing here?

Send us the link to its official page. Every suggestion is checked by hand — the licence, the download link and the terms — before anything is published.

Suggest a tool