Identifier number validator
Validate identifiers, decode GS1 data, and experiment with check digits.
Powered by stdnum-clj - the open-source Clojure library behind this tool, covering 257 identifier formats.
Checker
Enter a number and choose a format, or let stdnum detect it.
GS1-128 decoder
Parse application identifiers from a GS1 string.
Check-digit playground
Validate a value or compute its check digit.
Operation
Numbers are validated in memory and never stored or logged.
Powered by stdnum-clj, which covers 257 identifier formats. Need one that is missing, or spotted a format validating incorrectly? Open an issue and it can be added.