GSTIN Format Validator
Validate the structural format of a 15-character Goods and Services Tax Identification Number (GSTIN) and extract its 2-digit state code and 10-character PAN.
Format check
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What is GSTIN Format Validator?
GSTIN Format Validator inspects a 15-character Goods and Services Tax Identification Number (GSTIN) against the statutory structural format prescribed by the GST Council. It verifies the 2-digit state code prefix, the embedded 10-character Permanent Account Number (PAN), the 1-character entity registration code, the standard default "Z" character in position 14, and the final check digit position. Valid codes display their parsed state code and embedded PAN.
How to use GSTIN Format Validator
- 1Enter or paste a 15-character Goods and Services Tax Identification Number (GSTIN) into the input field.
- 2Check the format validation status indicator to see if the structure matches the standard format.
- 3View the parsed 2-digit state code and embedded 10-character PAN displayed below valid numbers.
Key features
15-Character Structure Verification
Checks that input strictly conforms to the statutory regex pattern ^[0-9]{2}[A-Z]{5}[0-9]{4}[A-Z][1-9A-Z]Z[0-9A-Z]$.
State Code Parsing
Extracts and displays the 2-digit Census State Code prefix (positions 1–2) upon successful format validation.
Embedded PAN Extraction
Extracts and displays the underlying 10-character business or individual PAN (positions 3–12).
Offline Client-Side Execution
Runs 100% in local browser memory without network queries or storage of sensitive tax identifiers.
Examples & use cases
Valid GSTIN Structure
Standard 15-character Maharashtra business GSTIN
27AABCU9603R1ZM
Format check: Valid GSTIN structure. | State code: 27 | Embedded PAN: AABCU9603R
Invalid GSTIN Missing Required Character
GSTIN with missing fixed "Z" character in the 14th position
27AABCU9603R1AM
Format check: Not a valid GSTIN format.
Frequently asked questions
Helpful guides & tutorials
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