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.
Star History
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+101
STARS · LAST 30 DAYS
3
PER DAY
#97
MOST-STARRED C#
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +30 | +101 | +270 |
| Per day | 4 | 3 | 3 |
| Forks gained | +4 | +6 | +16 |
KillerPDF gained 101 stars in the last 30 days, about 3 a day, and now has 4K. It is about 1 year old and has averaged roughly 4K stars a year. It ranks #97 among C# repositories and #2,129 across all languages on GitHubRepo.
Trending Record
12
DAYS ON TRENDING
#532
BEST RANK
Sep 25, 2026
FIRST APPEARANCE
Active
STATUS TODAY
KillerPDF has maintained a continuous presence across global trending indexes, peaking at #532. Below is the 30-day activity profile:
💡 Overview
KillerPDF is an open-source project written in C#: 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.
Engineered for speed, consistency, and developer ease, it solves common hurdles in csharp, dotnet, dotnet-core. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in C# for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/SteveTheKiller/KillerPDF.git
cd KillerPDF⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
C# environment and standard tooling
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
KillerPDF coordinates its core functionality through a modular C# pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed KillerPDF into C# backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open GPL-3.0 license.
🚀 Getting Started
Install KillerPDF using your package manager: `git clone https://github.com/SteveTheKiller/KillerPDF.git`
Initialize your project workspace or configuration file for KillerPDF.
Import KillerPDF into your codebase or invoke it directly from your terminal.
Execute your test suite or run `KillerPDF --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with C#, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
SteveTheKiller/KillerPDF is currently ranked #2,129 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #2,124 | github/relative-time-element | JavaScript | ★ 4K | Compare ↗ |
| #2,124 | apache/httpd | C | ★ 4K | Compare ↗ |
| #2,126 | svenfuchs/rails-i18n | Ruby | ★ 4K | Compare ↗ |
| #2,126 | obsidian-tasks-group/obsidian-tasks | TypeScript | ★ 4K | Compare ↗ |
| #2,126 | videolan/vlc-android | Kotlin | ★ 4K | Compare ↗ |
| #2,129 | SteveTheKiller/KillerPDF This Project | C# | ★ 4K | |
| #2,130 | qunitjs/qunit | JavaScript | ★ 4K | Compare ↗ |
| #2,131 | datamodel-code-generator/datamodel-code-generator | Python | ★ 4K | Compare ↗ |
| #2,132 | stripe/stripe-php | PHP | ★ 4K | Compare ↗ |
| #2,133 | kubernetes/test-infra | Go | ★ 4K | Compare ↗ |
| #2,134 | UsefulSoftwareCo/executor | TypeScript | ★ 4K | Compare ↗ |
Frequently Asked Questions
What does KillerPDF do? +
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.
What language is KillerPDF written in? +
The primary language is C#. Topics include: csharp, dotnet, dotnet-core, fast, gplv3.
Is KillerPDF actively maintained? +
Yes, the last recorded push was on Oct 5, 2026 with 47 open issues being tracked.
How many stars does KillerPDF have? +
KillerPDF has 4,033 stars and 320 forks on GitHub.
How does KillerPDF rank among GitHub repositories? +
With 4,033 stars, SteveTheKiller/KillerPDF is ranked #2,129 globally across all repositories tracked on GitHubRepo and #97 among C# projects.
What license is KillerPDF distributed under? +
The repository reports a GPL-3.0 license. Always verify the repository LICENSE file for legal terms.
