Functional, extensible, input validation. Make sure the value you receive is EXACTLY what you expect.

[](https://badge.fury.io/js/validate-ethereum-address) [](https://opensource.org/licenses/MIT)

Give me a string and I'll tell you if it's a valid npm package name

Give me a string and I'll tell you if it's a valid npm package license string

Generic configuration validation tool that helps you with warnings, errors and deprecation messages as well as showing users examples of correct configuration.

Validate type in javascript at runtime

Loosely validate an event.

Validates if a value is an array.

Validates if a value is a function.

Validates whether a string matches the production for an XML name or qualified name

Validates if a value is a number.

Validates if a value is an integer.

Validates if a value is an integer array.

Check if a buffer contains valid UTF-8

Validate a date

Validate XML, Parse XML, Build XML without C/C++ based libraries

Check if a string is SVG

TypeScript definitions for validate-npm-package-name

Javascript validator for UUID versions 1 through 5

Email address and domain validation