Validate Packages

JWA, JWS, JWE, JWT, JWK, JWKS for Node.js, Browser, Cloudflare Workers, Deno, Bun, and other Web-interoperable runtimes

Check if a string is a scoped npm package name

Swagger 2.0 and OpenAPI 3.0 parser and validator for Node and browsers

Declarative validations for JavaScript

Express middleware for the validator module.

ESLint shareable config for the Google style

A simple and composable way to validate data in JavaScript (and TypeScript).

Check if a string is a URL

Map all the things, check all the maps

Validates if a value is an array.

Validates if a value is a number.

Validates if a value is an integer.

Pretty ESLint formatter

ESLint shareable config for XO

Client-side form validation made easy

Is given string a language code (as per IANA)

Validates if a value is a string primitive.

Parse, validate, manipulate, and display dates

Validates if a value is a nonnegative integer.

Validates if a value is a number primitive, excluding NaN.