Paste any Indian GSTIN (15 chars). We verify the checksum digit and decode the state code, PAN and entity type — all in your browser. Nothing is uploaded.
LeadWisp stores GSTIN per client, validates it on entry and reminds you of every GST/TDS deadline via WhatsApp + email. From ₹199/month.
Try LeadWisp free →The 15-character GSTIN follows a fixed pattern:
27 = Maharashtra, 29 = Karnataka).Z (reserved).No. This tool only validates the format and checksum offline. To verify whether the GSTIN is actually active and to whom it's registered, use the official portal at gst.gov.in.
No. The validation runs entirely in your browser using JavaScript. We never see what you paste.
It's a self-validating digit using a base-36 weighted algorithm (alternating weights 1 and 2). If the math doesn't match, the GSTIN is malformed.