Free GSTIN checker

No. It checks only the format of the number. To see whether a registration is active, suspended or cancelled, and the legal name of the business, use Search Taxpayer on the GST portal.

No. The check runs inside your own browser using a fixed formula. Nothing is sent to RetailCore or anyone else, and nothing is saved.

Confirm it on the GST portal first. A number can be correctly formed but belong to another business, or its registration may be cancelled or suspended. Also check that the legal name on the portal matches your customer.

The 15th character is worked out from the first 14 using a fixed formula. If one character is typed wrong, the last character usually stops matching — that is how this checker catches most typing mistakes.

On regular GST registrations the 14th character is Z. A few special registration types use another letter. If the number belongs to an ordinary shop or business and character 14 is not Z, it is most likely mistyped.

Yes. The first two digits are the state code of that registration — for example 07 for Delhi, 27 for Maharashtra and 33 for Tamil Nadu. One business can have a different GSTIN in each state where it is registered.

Yes, on the GST portal: Search Taxpayer → Search by PAN lists the GSTINs linked to that PAN. You can then check each one with Search by GSTIN/UIN.

Yes. It is free to use, with no sign-up and no limit on how many numbers you check.