Free, open-source PDF editor for Windows with a built-in PDF 2.0 engine, offering viewing, OCR, editing, signing, and form filling without a subscription.
4.1K331C#GPL-3.0Updated 4 days ago
1 alternative
Best open-source alternatives to Nitro PDF (2026)
Looking for a free, open-source alternative to Nitro PDF? These 1 projects can replace it. Each one is reviewed by a human and explained in plain words, so you can compare stars, license and maintenance at a glance.
Quick comparison
| Project | Stars | License | Last commit |
|---|---|---|---|
| SteveTheKiller/KillerPDF | ★ 4.1K | GPL-3.0 | 4 days ago |
FAQ
- Is there a free, open-source alternative to Nitro PDF?
- Yes. The most popular open-source alternatives to Nitro PDF on Repolode are KillerPDF.
- Which Nitro PDF alternative should I choose?
- KillerPDF has the most GitHub stars and is released under GPL-3.0. Compare the license and last commit of each option in the table above before choosing.