
Popularity
★ 89k
Last update
August 2026
License / pricing
MIT
Category
Everyday life
What it does
Merge, split, OCR, sign and convert PDFs on your own server. One app replaces a pile of sketchy websites.
Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.
Screenshots & visuals

Before you start
- Setup difficultyEasy to start
- Command lineRequired
- API keyNot required
- Sends data onlineNo
Judged automatically from the project's own metadata. Always confirm on the official page.
Stirling-PDF FAQ
- Is Stirling-PDF free?
- Yes. It runs on your own machine, so there is no usage-based cost either.
- Do I need to install anything or write code to use Stirling-PDF?
- It needs the command line. If you are not comfortable typing commands, expect to get stuck during setup.
- Does Stirling-PDF work on a phone?
- No. It needs a computer.
- Can I use Stirling-PDF commercially?
- The licence is MIT, which permits commercial use. Conditions such as keeping the copyright notice still apply, so read the licence text before shipping it inside something.