Another JSON Schema Validator

String validation and sanitization

Object schema validation

The CakePHP framework

Express middleware for the validator module.

Symfony Validator Component

A beautiful command-line prompt for node.js

webpack Validation Utils

Object schema validation

A higher order component decorator for forms using Redux and React

Client-side form validation made easy

A library for validating emails against several RFCs

Form Validation for Vue.js

The most awesome validation engine ever created for PHP

A fast and easy to use JSON Schema validator

🛠 Nette Utils: lightweight utilities for string & array manipulation, image handling, safe JSON ...

Build forms in React, without the tears

🏁 High performance subscription-based form state management for React

Simple, lightweight model-based validation for Vue.js

A lightweight library for converting complex datatypes to and from native Python datatypes.

TypeScript runtime type system for IO decoding/encoding

A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CS...

Type check values

Check if a buffer contains valid UTF-8

Data validation and settings management using python 3.6 type hinting

Decorator-based property validation for classes.

Function argument validation for humans

Semver library that offers utilities, version constraint parsing and validation.

Thin assertion library for input validation in business models.

Featureful configuration management library for Node.js (nested structure, schema validation, etc.)