check-digit

🔒 An easy-to-use check digit library for data validation

A set of check digit algorithms implemented in Dart

Like file(1) but for numbers

verhoeff check-digit validator and generator

extends commons-validator with ISO IEC 7064 System check digits.

Funções C#, Javascript, PHP, perl e Python para validação de CNPJ alfanumérico conforme Instrução Normativa RFB nº 2229, de 15 de outubro de 2024.

luhn check-digit validator and generator

A Dart port of the Apache Commons Validator routines - email, URL, domain, IP, IBAN, ISBN, ISIN, ISSN, credit card, check digit, number and date validators.

Damm algorithm functions, a check digit algorithm that detects single-digit errors and adjacent transposition errors

International Mobile Equipment Identity (IMEI)

verhoeff check-digit validator and generator

Calculate the check digit(mod10 algorithm)

verhoeff check-digit validator and generator

An C# implementation of the Luhn algorithm and other check digit algorithms

damm check-digit validator and generator

luhn check-digit validator and generator

Check digit formula base on https://www.gs1.org/services/how-calculate-check-digit-manually.

Check-digit mathematics toolbox for DeepSeek Harness (dsh): generate, validate, repair and detect check digits for 15 schemes (Luhn, Verhoeff, Damm, ISBN, EAN, UPC, GTIN-14, ISSN, ISIN, CUSIP, IBAN, CAS, ABA) plus ISBN-10/13 conversion and a single-edit repair search — zero runtime dependencies

Calculadora portable del dígito verificador (DV) de patentes CABA que pide AGIP. Windows, sin instalación, sin conexión y con código fuente auditable.