PDF4QT
Jakub Melka
Download from the vendor
github.com
A PDF suite with an advanced viewer offering annotation editing, regular-expression search and digital signature verification, a lightweight viewer, a page organiser (merge and split) and a comparison tool that shows the differences between two PDFs in a detailed report. It also supports signing documents, redaction, compression and text-to-speech. Suits anyone looking for a free alternative to a commercial PDF editor. There is no macOS version.
Ratings & Reviews
| Licence type | Completely Free, Open Source |
|---|---|
| Licence terms | Open-source licence (MIT). Free for any purpose including commercial work, with no time limit, no registration and no licence key. |
| Platforms | Linux, Windows |
| Engineering field | Architecture, Civil Engineering, Electrical & Electronics, Mechanical Engineering |
| Tool type | General Productivity |
| Vendor site | jakubmelka.github.io |
This link goes to the vendor site. EngiFree hosts no installers and distributes no cracked versions.
Last verified: 2026-10-05
