Tech Bichar

GSTIN Validator

Check that a GSTIN has 15 characters and a valid checksum. We do not call the GST portal.

How to validate a GSTIN

  1. Paste a 15-character GSTIN.
  2. See structure and checksum result.
  3. Treat a pass as format-only, not registration proof.

Format check only. Confirm registration on the GST portal.

Frequently asked questions

Does this prove a GSTIN is active?

No. It only checks format and checksum. Confirm on the official GST portal.

What is the checksum?

The last character is a check digit over the first 14.

PAN inside GSTIN?

Characters 3–12 are the PAN.

Private?

Yes. Nothing is sent to any government API.

Free?

Yes.

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