Validate a GSTIN format
Check that a GSTIN is correctly formatted and see the state and PAN it encodes.
Calculated in your browser. Nothing you enter is sent to a server.
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GSTIN
Checks format and structure only. Not a live lookup against the GST department's registry. Calculated in your browser.
01
Paste the GSTIN
The 15-character number from an invoice or registration certificate.
02
Check the format
Confirms the structure is correct and decodes the state code.
03
Review the decoded PAN
The 10-character PAN embedded in the GSTIN, and its holder type.
Frequently asked
Does this confirm the GSTIN is actually registered?
No. This checks the format and structure only. It doesn't verify the GSTIN against the GST department's live registry, so it won't catch a well-formed number that was never actually issued or has since been cancelled.
What are the 15 characters made of?
2 digits for the state code, 10 characters for the business's PAN, 1 digit for the registration number within that PAN, a fixed 'Z', and 1 final check character.
Is my GSTIN sent anywhere?
No. The check runs entirely in your browser.