Calculator values stay local
Entered digits, selected formats, generated identifiers and validation results remain in your browser. There is no product API, account, database, saved history or result URL.
No value collection
CheckDigit does not transmit calculator inputs or results for storage, lookup, scanning or analytics.
Optional analytics
Anonymous page analytics runs only after consent. It never records identifier values, check digits, calculated results or weighted steps.
Your control
You can reject analytics and still use the complete calculator. Cookie settings remain available in the footer.
Questions: sympify.info@gmail.com