GST Number Validator
Validate any GSTIN and decode state, embedded PAN, entity type, and checksum.
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* Validates GSTIN format and checksum only. Does not verify registration status with the GST portal.
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About this tool
How to use GST Number Validator
- 1Enter a 15-character GSTIN
- 2Format, structure, and checksum are validated instantly
- 3View the decoded state, embedded PAN, and entity type
Frequently Asked Questions
What is a GSTIN?
GSTIN (Goods and Services Tax Identification Number) is a unique 15-character alphanumeric code assigned to every GST-registered business. It encodes the state code, the business's PAN, entity number, and a check digit.
How is the GSTIN structured?
GSTIN = 2-digit state code + 10-character PAN + 1-digit entity number (1–9 or A–Z) + 'Z' (fixed) + 1 checksum character. For example: 27AAPFU0939F1ZV — state 27 (Maharashtra), PAN AAPFU0939F.
Does this tool verify the GST registration status?
No. This tool validates the GSTIN format and checksum only. To verify active registration status, use the official GST portal at gst.gov.in > Search Taxpayer.
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