#validation-library

postal-code-checker is a comprehensive JavaScript/TypeScript package for validating postal codes across multiple countries. It provides an easy-to-use API for country selection and postal code validation, making it ideal for forms and address validation in web applications.

idnumbers: Unlocking the power of national ID numbers

Official SDKs for JSON Structure schema and instance validation

A Python library to sanitize/validate a string such as filenames/file-paths/etc.

Go library for applying struct defaults, applying and exporting typed values as well as validating fields with simple tags and type-safe rules.