GSTIN Validator
Validate a GST Identification Number — check format, identify the state, and verify the checksum character. Free and instant.
How to Read a GSTIN
| Characters | Meaning |
|---|---|
AA (1-2) | State code (e.g. 07 = Delhi, 27 = Karnataka) |
XXXXXXXXXX (3-12) | PAN number of the business |
X (13) | Entity code (business type) |
Z (14) | Reserved alphabet character (default “Z”) |
X (15) | Checksum character (computed from the first 14) |
This tool checks the format, state code and checksum of a GSTIN. It does NOT verify whether a GST number is currently registered / active with the GST Council — for that, check the official GST portal or a registered-verification service.
Why Validate a GSTIN?
Invoices & Tax Compliance
Catch typos in supplier or customer GSTINs before they cause input-tax-credit mismatches.
Legal & Contract Drafting
Legal notices and agreements often name a party by their GSTIN — verify the format before drafting.
Verify Business Identity
Confirm the state a business is registered in, useful for jurisdiction and dispute purposes.
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