receipt_long
GST Number Validator
Validate GSTIN, decode state, PAN & entity type. 100% client-side.
GSTIN Structure
Pos 1-2: State Code (01=J&K, 07=Delhi, 27=Maharashtra, 29=Karnataka...)
Pos 3-12: PAN of the taxpayer
Pos 13: Entity number (1-9, A-Z) for same PAN in same state
Pos 14: Always "Z" (default)
Pos 15: Checksum character (alphanumeric)