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SteveTheKiller/KillerPDF

Free and open-source PDF editor for Windows with a built-in PDF 2.0 engine. View, annotate, OCR, merge, split, crop, rotate, compare, edit text, draw, sign, fill forms, print, flatten, and open password-protected PDFs without a subscription.

C#GPL-3.0 license Last commit 6 days ago KillerPDF.net(opens in new tab)

Updated 8 min ago

Growth

Last 24 hours
+4
stars
Last 7 days
+61
stars
Last 30 days
+222
stars
Total stars
4,162
Forks
331

Top 3 in Computer vision this week

  1. 1 OpenMOSS/MOSS-Image +1.2k stars this week
  2. 2 AhmadHassan-BTed/B +2.2k stars this week
  3. 3 scenario-labs/blender-plugin +509 stars this week

This repo: #147 of 210 this week, #206 of 436 this month.

Also this week: #128 in C# & .NET, #311 in Windows

See all 210 Computer vision repos

Star history

3k3.2k3.5k3.8k4k4.2kAug 5Aug 19Sep 2Sep 16Sep 30Oct 14

Total stars at the end of each week, from GitHub’s daily star counts.

+61 stars this week, against ~67 in a usual week

Health signals

HealthyChecked Oct 21, 2026
Commit activity
Commits in 13 of the last 13 weeks 1,004 commits on the default branch in 90 days
Maintainers
1 commit author in 90 days Top author: 100% of the last 100 commits
Issue responsiveness
Median first response: 3 days 16 of the latest 50 issues opened in 90 days are closed
Pull requests
44 merged, 6 closed, 0 open Of the latest 50 opened in 90 days
Releases
Last release: 6 days ago 39 releases in the last 12 months
Project hygiene
License, CI; no security policy
OpenSSF Scorecard
Not scanned Unknown, not counted against the project

Signals are computed automatically from public GitHub data. They are not an endorsement or a security audit. How health is computed

README

README.md

KillerPDF is a free, open-source PDF editor for Windows. View, annotate, OCR, merge, split, edit text, draw, sign, fill forms, print, flatten, and open password-protected PDFs without an Adobe subscription. Choose the compact Windows installer or the self-contained portable edition. Document processing stays on your computer, with no telemetry.

Full how-tos live on the help page; internals, formats, and limits on the technical page.

Read the full README on GitHub(opens in new tab)