KillerPDF

KillerPDF 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.

Open source alternative to:

KillerPDF is a local-only, portable PDF editor for Windows built for field techs and privacy-conscious users. It offers high-quality rendering via PDFium, inline text editing with font matching, annotation tools (highlight, freehand draw, text boxes), digital signatures, merge/split capabilities, and full-text search — all without an Adobe subscription or any phone-home telemetry.

The application is distributed as a single self-installing EXE (~6 MB zipped) that targets .NET Framework 4.8. On first launch it presents an Install or Run dialog; if installed, it goes per-user to %LOCALAPPDATA% with no UAC required, registers as a PDF file handler, adds a Start Menu shortcut, and can self-uninstall cleanly. Password-protected PDFs are supported, with the decrypted copy held in temp for the session.

OpenAltFinder Score

56/100

Project Health (50%)

68/100

License (20%)

60/100

Self-hostable (20%)

0/100

Recency (10%)

100/100

How scoring works

Project Details

License

GPL-3.0

Self hostable

Repository details

Version

v1.8.80

Created

4/16/2026

Stars

4,073

Forks

324

Open issues

Last commit

10/7/2026

Updated 10/10/2026, 8:00:37 PM

View Repository

Repository activity

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