Every PDF signing tool I tried needed Java, browser plugins, or cloud uploads. I built PDFSign.in to fix that.
Native Windows app. Plug in your USB certificate token. Sign in 60 seconds. Or embed a signature/stamp image — no token needed.
✅ 100% offline — files never leave your PC
✅ Batch-sign hundreds of PDFs
✅ No Java. No plugins. .NET 10.
✅ RFC 3161 timestamp + PDF encryption
30-day free trial. Now on Microsoft Store.
