GSTIN Validator
Check whether a GST number is correctly formed โ verify the format, checksum, state code and embedded PAN instantly.
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15-character GST Identification Number
This checks the format and checksum only โ not whether the GSTIN is currently registered/active on the GST portal.
Want unbranded documents & full GST billing?
Get the free SmartVyapaar app โ your logo, no footer, plus customers, payments, stock & reports. Trusted by 1,000+ businesses.
How to use this tool
- 1
Type or paste the 15-character GSTIN.
- 2
The tool checks the format and the official checksum digit.
- 3
See the state, the PAN inside the GSTIN and the check status.
- 4
Use it to catch typos before you bill or pay someone.
About the GSTIN Validator
A GSTIN (GST Identification Number) is a 15-character code: 2 digits for the state, 10 characters for the PAN, 1 entity digit, a fixed 'Z', and a final checksum character. The checksum lets you catch typos mathematically.
This validator checks the structure and recomputes the checksum entirely in your browser โ nothing is sent to any server. Note: it verifies the format and checksum, not whether the GSTIN is currently active on the GST portal.
The SmartVyapaar app stores verified GSTINs against each customer so your invoices always carry the right details.
Frequently asked questions
No. It validates the format and checksum offline. To confirm a GSTIN is live and registered, check the official GST portal.
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