PDF4QT
PDF4QT: A capable free PDF toolkit for Windows and Linux, without OCR or form creation. Ranked #77 of 102 in PDF Editors by our editors (3.0/10); pricing: Free plan; best for open-source Windows and Linux users.
At a glance
- Editor score3.0 / 10
- PricingFree plan
- Best forOpen-source Windows and Linux users
- Free planYes
- Paid fromFree
- OCRNo
- Facts checked20 Sep 2026
Where it wins
- Free and open source under the MIT License
- Combines editing, annotations, forms, pages, compression, and signatures
- Includes document comparison and a command-line tool
Where it doesn't
- No OCR capability
- Does not create PDF forms
- Limited to Windows and Linux
Our verdict on PDF4QT
PDF4QT is an open-source PDF toolkit maintained by Jakub Melka for Windows and Linux users who want desktop tools without a paid plan. It combines PDF viewing and rendering with content editing, annotation editing, form filling, page organization, document comparison, compression, encryption, digital signatures, and page-to-image conversion. The package also includes a command-line tool, making it relevant to users who need more than a basic PDF viewer while still preferring an open-source desktop application.
Its feature breadth is a central strength. Users can merge, split, move, clone, and add pages, compare documents, fill forms, apply signatures and encryption, and compress files in one toolkit. PDF4QT also covers both graphical desktop workflows and command-line use. The published installation options include Windows binaries, Linux Flatpak and AppImage packages, and installation from source. That range suits users who are comfortable choosing an installation method for their operating system and who value access to an MIT-licensed project.
The main trade-off is capability coverage. PDF4QT supports editing existing PDF content and filling forms, but it does not provide OCR or PDF form creation. Its platform support is also limited to Windows and Linux, so it is not a fit for users seeking a macOS or mobile PDF editor. Choose PDF4QT for free, open-source PDF management with page tools, comparison, signatures, compression, and command-line access. Choose an alternative if scanned-document OCR, form authoring, or broader platform support is essential.
Your product? Our editors can test PDF4QT in depth and publish a review, labelled as paid · from $149/mo →
PDF4QT pricing
PDF4QT fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Text editing | Yes |
| Annotation tools | Yes |
| OCR | No |
| PDF conversion | Yes |
| Form creation | No |
| Supported platforms | Windows, Linux |
| Deployment | Desktop |
| Platforms | Windows, Linux |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 20 Sep 2026 |
Alternatives to PDF4QT
- Foxit PDF EditorA mature PDF workspace with deep editing, OCR, forms, security, and integrations.9.3
- iLovePDFA broad PDF toolkit with free access, offline desktop processing, and cross-device apps.9.2
- SmallpdfA broad PDF toolkit for simple editing across web, Windows, mobile, and Chrome.9.1
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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