About

About DSC Checker

Last updated: April 2026  ·  Effective date: April 2026  ·  Applies to: dscchecker.com

What is DSC Checker?

DSC Checker is a free, browser-based tool built to help Indian professionals, businesses, and individuals quickly verify the validity of their Digital Signature Certificates (DSC) — without uploading anything to a server.

Whether you need to check if your DSC is valid before filing income tax returns, GST returns, or MCA documents, or want to inspect the certificate's issuer, key usage, and algorithm strength, DSC Checker gives you instant answers.

Why We Built This

DSC renewal surprises are a real problem. Professionals often discover their certificate has expired only when they're in the middle of a critical filing deadline. We built DSC Checker to make certificate health checks effortless, fast, and — most importantly — completely private.

Our Privacy Commitment

🔒 Zero data upload. Your certificate files are processed entirely within your browser. Nothing is ever sent to our servers. We have no technical ability to see your certificate contents.

What You Can Do

  • Check expiry date and days remaining
  • Verify certificate owner (CN, O, OU)
  • Identify issuing Certifying Authority
  • Detect SHA-1 weakness and Class 3 status
  • View key usage and extended key usage
  • Bulk check multiple certificates at once
  • Export results as CSV or PDF
  • Unlock and inspect PFX/P12 certificates

Supported Formats

We support .cer, .crt, .pem, .der, .pfx, .p12, and .p7b certificate formats.

Who Is Behind DSC Checker?

DSC Checker is built and maintained by [SANTANU SAMANTA / BANGLAINFO.IN], based in India. We are passionate about building tools that make compliance workflows easier for Indian professionals.

Get in Touch

We'd love to hear your feedback, suggestions, or bug reports. Contact us here.