In simple English
KillerPDF is a free program for Windows that lets you open, edit, sign, and convert PDF documents. You do not need to pay a monthly subscription or create an account to use it. All your files stay on your computer, and the program does not send tracking data back to the creator. It also includes a command-line tool for running batch tasks from a terminal.
What it is
KillerPDF is an open-source PDF editor built for Windows using C# and .NET 10. It includes a rendering engine, a local optical character recognition tool, and support for merging, splitting, and signing documents.
What it is good for
Solo builders who need a fast, local PDF editor on Windows without paying for commercial software or relying on cloud services.
- Completely free and open-source with no subscription fees or account requirements.
- Runs entirely offline on your computer with zero telemetry.
- Includes a command-line interface for batch processing documents.
- Only runs on Windows 10 or 11.
- Requires the .NET 10 Desktop Runtime unless you use the portable edition.
- GPLv3 licence requires you to share source code if you distribute modified versions.
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winget install killerpdf