head to head · open source
ONLYOFFICE Docs vs PDF4QT
ONLYOFFICE Docs has 7,081 GitHub stars, 1,327 forks, 1,135 open issues and last shipped 8 days ago. PDF4QT has 1,505 stars, 154 forks, 32 open issues and last shipped 2 days ago. ONLYOFFICE Docs leads on adoption by 370% (7,081 vs 1,505 stars). ONLYOFFICE Docs is written in Shell under AGPL-3.0; PDF4QT is written in C++ under MIT. ONLYOFFICE Docs has attracted 19% as many forks as stars, PDF4QT 10%. PDF4QT was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| ONLYOFFICE Docs | PDF4QT | |
|---|---|---|
| GitHub stars | ★ 7.1K | ★ 1.5K |
| License | AGPL-3.0 | MIT |
| Written in | Shell | C++ |
| Last push | 2026-10-26 | 2026-11-01 |
| Forks | ⑂ 1.3K | ⑂ 154 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ONLYOFFICE Docs if
- You weight community size — 7.1K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Shell
- You value the larger contributor base for long-term maintenance
pick PDF4QT if
- You want the PDF4QT feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C++
- You evaluated both and PDF4QT fits your workflow better
About ONLYOFFICE Docs
Welcome to the ONLYOFFICE Docs repo! ONLYOFFICE Docs is a free collaborative online office suite comprising viewers and editors for texts, spreadsheets, presentations, forms, PDFs, and diagrams. It is fully compatible with Office Open XML formats (.docx, .xlsx, .pptx) and enables collaborative editing in real time. ONLYOFFICE Docs can be used as a part of ONLYOFFICE DocSpace and ONLYOFFICE Workspace, or with third party sync&share solutions (e.g. Odoo, Moodle, ownCloud, Seafile, etc.) to enable collaborative editing within their interface. ONLYOFFICE Docs is available in three tailored editions to suit your…
read the full ONLYOFFICE Docs overview →
About PDF4QT
PDF4QT (c) Jakub Melka 2018 2026 Mgr.Jakub.Melka@gmail.com This software is consisting of PDF rendering library, and several applications, such as advanced document viewer, command line tool, and document page manipulator application. Software is implementing PDF functionality based on PDF Reference 2.0. It is written and maintained by Jakub Melka. Software works on Microsoft Windows / Linux. Software is provided without any warranty of any kind. Should you find this software beneficial, your support would be greatly appreciated :heart: Sponsor! 1. ACKNOWLEDGEMENTS This software is based in part on the work of…
read the full PDF4QT overview →
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Frequently asked questions
Is ONLYOFFICE Docs or PDF4QT more popular?
ONLYOFFICE Docs has 7,081 GitHub stars and PDF4QT has 1,505. ONLYOFFICE Docs has the larger community by that measure.
Are ONLYOFFICE Docs and PDF4QT free?
Both are open source. ONLYOFFICE Docs is licensed under AGPL-3.0 and PDF4QT under MIT. Neither carries a licence fee.
What is the difference between ONLYOFFICE Docs and PDF4QT?
ONLYOFFICE Docs is written in Shell and PDF4QT in C++. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, ONLYOFFICE Docs or PDF4QT?
Choose ONLYOFFICE Docs if you want the larger community (7,081 stars) or its AGPL-3.0 licence terms. Choose PDF4QT if its feature set, stack or MIT licence fits better. Both are self-hostable.