Start building in 60 seconds
CobaltPDF runs in trial mode straight from NuGet — no registration, no product key, no time limit. 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 trial mode.
using CobaltPdf;
await new CobaltEngine()
.RenderHtmlAsPdfAsync("<h1>Hello, CobaltPDF!</h1>")
.SaveAsAsync("hello.pdf");That’s it — you’re generating PDFs
Trial mode is fully functional with all features enabled. The only difference is a small watermark on output. When you're ready for production, purchase a licence key on the pricing page.
No time limit
Evaluate for as long as you need. The trial 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 trial limitation is a small watermark on generated PDFs.
Ready for production?
Remove the watermark and unlock priority support with a licence key.