Sample validation
Status: Valid — state 27 (Maharashtra), PAN AAPFU0939F, entity 1, Z, checksum V.
GSTIN Validator
Validate an Indian GSTIN (GST Identification Number) format instantly. Free online GSTIN validator checks structure, state code, PAN and checksum without storing your input.
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Results
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What is this calculator for?
Instantly checks that an Indian GSTIN follows the correct 15-character format (state code, PAN, entity code, Z flag and checksum) — without storing your input.
How to Use This Calculator
Enter the values below, then press Calculate (or press Enter). The calculator updates your results instantly. Try different values to see how your inputs change the outcome.
- GSTIN / GST Number — enter a text value. A typical GSTIN / GST Number would be 27AAPFU0939F1ZV.
- Review your results — the key output is highlighted, with supporting figures below.
What You'll Need
- GSTIN / GST Number
- a text value · required
About This Calculator
This free GSTIN Validator checks whether an Indian GST Identification Number is correctly formatted. A valid GSTIN is exactly 15 characters:
Positions 1–2 are the 2-digit state code (per the GST state/UT code list). Positions 3–12 are the taxpayer’s 10-character PAN. Position 13 is the entity code (a digit or letter). Position 14 is always "Z". Position 15 is a checksum digit (alphanumeric).
The validator checks each part step-by-step and tells you exactly what is wrong, if anything. Your input is validated entirely in your browser and is never stored or transmitted.
Worked Examples
Frequently Asked Questions
What is a GSTIN?
A GSTIN (GST Identification Number) is the 15-character unique number assigned to a taxpayer registered under the Indian GST system. It encodes the state code, PAN, entity type and a checksum.
Does this validator check registration status with the government?
No — this tool validates only the structural/format rules of a GSTIN locally in your browser. It does not query the GSTN portal. For live status, consult the official GST portal.
Is my GSTIN stored?
No. Validation happens entirely in your browser and no input is sent to, or stored on, any server. This tool collects nothing.