About CobaltPDF
High-performance HTML-to-PDF for .NET
Our Mission
CobaltPDF was built with one goal: make HTML-to-PDF conversion in .NET fast, reliable, and effortless. We believe developers shouldn't have to wrestle with clunky APIs, fragile rendering engines, or bloated dependencies just to produce a PDF.
Designed for modern .NET, CobaltPDF handles the complexity of browser-grade rendering so you can focus on building great software. It ships as two libraries behind one fluent API: CobaltPDF, powered by Chromium for pixel-perfect fidelity, and CobaltPDF.WebKit, a lightweight WebKit engine for memory-sensitive, high-volume workloads on Linux — with one license key covering both.
What We Stand For
Performance
Pool-managed browser instances, async-native architecture, and intelligent resource reuse keep memory low and throughput high — in both engines.
Simplicity
A clean, fluent API that feels natural to .NET developers. Generate a PDF from a URL or HTML string in as little as three lines of code.
Developer Experience
Comprehensive documentation, real-world examples, and first-class ASP.NET Core integration so you're productive from minute one.
Reliability
Built-in wait strategies, automatic crash recovery, and configurable timeouts ensure consistent output in production environments.
The Company
CobaltPDF is developed and maintained by Modus Squared Limited, a UK-based software company focused on developer tooling for the .NET ecosystem. We're committed to shipping well-crafted libraries that solve real problems and stay out of your way.
Ready to get started?
See what CobaltPDF can do for your project.