India Utils: GSTIN, PAN and IFSC Tools

Validators for the identifiers Indian businesses deal with daily. The GSTIN tool verifies the real check digit rather than only the shape, so it catches a transposed character that looks perfectly normal. Everything runs in your browser except the IFSC branch lookup, which has to consult a live directory.

Which of these can actually be verified?

Worth knowing before you rely on any online checker, because the three identifiers are not equally checkable.

  • GSTIN carries a published check digit computed from the other fourteen characters. A number with one wrong or swapped character is arithmetically impossible, so this is a genuine verification rather than a format check.
  • PAN has no publicly documented check-digit algorithm. Only the format and the holder type encoded in the fourth character can be checked offline; issuance can be confirmed only by the Income Tax Department.
  • IFSC has no check digit either, so any correctly shaped code looks valid. The only real check is resolving it against the directory of registered branches — which is what our lookup does.

All three are also available to AI agents through our MCP server, so Claude, Cursor or your own agent can verify a number rather than produce a plausible-looking guess.