The simplest way to digitally sign documents on Windows. Designed for end users — no technical setup, no command line, just open and sign.
A clean, powerful desktop application built for everyday document signing
Sign documents without an internet connection. Your certificates stay local, your data stays private.
Sign hundreds of documents in one operation. Ideal for invoice batches, contracts, and payroll documents.
Works with all Class 2 and Class 3 DSC tokens as well as PFX certificate files from any CA.
Drag and drop your signature box anywhere on the page. Preview before you sign.
Always on the latest version via the Microsoft Store. No manual downloads or IT involvement needed.
All signatures comply with the Information Technology Act 2000 and are legally valid in India.
Three steps from Microsoft Store to signed document
Click the button below or search "SuTan" in the Microsoft Store app on your Windows 10/11 PC.
Click Get / Install. The app is free to download. No credit card or account needed.
Enter your SuTan license key, load your certificate, and start signing documents immediately.
SuTan Desktop is lightweight and runs on any modern Windows PC without special hardware.
SuTan Desktop is for end-user signing. If you need to sign documents programmatically from SAP, Tally, Odoo, or a custom application — use the OP Signing Utility, which exposes a local REST API.