KillerPDF vs SumatraPDF
Comparing two open source alternatives to Adobe Acrobat and Foxit Reader and Nitro PDF. Use the comparison below to decide which one fits your needs.
KillerPDF
GPL-3.0KillerPDF is a lightweight, fully portable PDF editor for Windows. Edit, merge, annotate, and sign PDFs locally with no subscription, accounts, or hidden telemetry anywhere on your computer.
SumatraPDF
GPL-3.0Lightweight, free PDF, eBook, and comic reader for Windows that launches instantly and stays out of the way; multi-format support with minimal interface.
Side-by-side comparison
| KillerPDF | SumatraPDF | |
|---|---|---|
| License | GPL-3.0 | GPL-3.0 |
| Self-hostable | No | No |
| GitHub Stars | 4,012 | 17,676 |
| Forks | 317 | 2,046 |
| Open Issues | 45 | 68 |
| Last Commit | Sep 27, 2026 | Sep 29, 2026 |
| First Released | Apr 16, 2026 | Oct 2, 2012 |
| Categories | ||
| Tags |
GitHub stars over time
GitHub stars over time
Similar open source alternatives
PdfDing
Self-hosted PDF manager, viewer, and editor with multi-device sync, tagging, and an in-browser reader; deployable via Docker.
Adobe Acrobat
Sioyek
Cross-platform PDF viewer focused on textbooks and research papers with smart navigation, marks, bookmarks, and bibliography jumping.
Adobe Acrobat
EmbedPDF
A PDF viewer that seamlessly integrates with any JavaScript project
Adobe Acrobat Reader
Pympress
Lightweight GTK PDF presenter for dual-screen setups, showing current slide, next slide, and presenter notes on separate displays.
Adobe Acrobat
Koodo Reader
Cross-platform ebook reader supporting PDF, EPUB, MOBI, comics and more, with sync across Windows, macOS, Linux, Android, iOS, and Web.
Adobe Acrobat