GST Number Validator
Validate GSTIN format and extract state code, PAN, entity type. Instant, private. No government API — format check only.
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About GST Number Validator
Validate GSTIN (GST Identification Number) format structure and extract embedded information: state code (first 2 digits), PAN (characters 3-12), entity type (13th character), and check digit. Privacy-safe — only format validation, no government API call.
A GSTIN (GST Identification Number) follows a fixed 15-character structure that encodes real information: the first two digits are the state code, the next ten characters are the PAN of the business, followed by an entity code, a default check character, and a final checksum digit — which means a properly-formatted GSTIN can be partially decoded just by inspecting its structure, without needing to query the government portal. This is useful for quickly sanity-checking a GSTIN on an invoice before payment, verifying the state code matches the vendor's claimed location, or catching an obviously malformed number before it causes an issue in accounting software. This tool validates the format structure and extracts the embedded state code and PAN portion instantly.
How to use
- Enter the required details in the input fields — the result is generated instantly as you type.
- Cross-check the format or rule referenced near the result, since many India-specific formats follow fixed government or regulatory structures.
- Use the workflow links below if your task needs a related India-specific tool as a next step.
- Share the result via WhatsApp or Twitter using the buttons above if you need to pass it along.
- Everything runs in your browser only — no data you enter is sent to or stored on any server.
Tool details
⚡ Next step — complete your workflow
Expert note — India 2026
GSTIN structure: 2-digit state code + 10-char PAN + 1-digit entity number (1-9 for individuals, A-Z for others) + Z (default) + 1 check digit. A valid format does NOT confirm active GST registration.
Frequently asked questions
GSTIN vs GSTN — what's the difference?
GSTN (Goods and Services Tax Network) is the IT backbone for GST. GSTIN is the 15-character identification number assigned to every registered taxpayer.
How to find your state code from GSTIN?
First two digits: 01=J&K, 02=HP, 03=Punjab, 04=Chandigarh, 06=Haryana, 07=Delhi, 08=Rajasthan, 09=UP, 27=Maharashtra, 29=Karnataka, 33=Tamil Nadu, 36=Telangana.
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