Start building in 60 seconds
CobaltPDF runs in free evaluation mode straight from NuGet — no registration, no product key, no time limit, and free to use even in production. Just install and go.
Install the NuGet package
Run a single command in your .NET project — the package includes everything, Chromium bundled.
dotnet add package CobaltPdf
Click to copy
Write your first PDF
No product key needed — the library works immediately in free evaluation mode.
using CobaltPdf;
await new CobaltEngine()
.RenderHtmlAsPdfAsync("<h1>Hello, CobaltPDF!</h1>")
.SaveAsAsync("hello.pdf");That’s it — you’re generating PDFs
Evaluation mode is fully functional with every feature enabled, including in production. The only difference is a small watermark on output. When you want to remove the watermark, purchase a license key on the pricing page.
No time limit
Evaluate for as long as you need. Evaluation mode never expires.
Full feature access
Every API is available — headers, footers, margins, JavaScript rendering, and more.
No key required
Simply install the NuGet package. No registration, no product key entry.
Watermark only
The only difference between evaluation and paid mode is a small watermark on generated PDFs.
Ready for production?
Remove the watermark and unlock priority support with a license key.