String validation

The most powerful data validation library for JS

📋 React Hooks for forms validation (Web + React Native)

A Higher Order Component using react-redux to keep form state in a Redux store

CakePHP: The Rapid Development Framework for PHP - Official Repository

✔ Template Driven Validation Framework for Vue.js

🏁 High performance subscription-based form state management for React

💯Go Struct and Field validation, including Cross Field, Cross Struct, Map, Slice and Array diving

The most awesome validation engine ever created for PHP

Simple, lightweight model-based validation for Vue.js

A JavaScript plugin for entering and validating international telephone numbers

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

An express.js middleware for validator.js.

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

Validation made easy using TypeScript decorators.

[Go] Package of validators and sanitizers for strings, numerics, slices and structs

Data parsing and validation using Python type hints

☑️ JavaScript fluent validation library

A Swift framework for parsing, formatting and validating international phone numbers. Inspired by Google's libphonenumber.

Language-agnostic HTTP API Testing Tool

Runtime type system for IO decoding/encoding

Function argument validation for humans

Python Data Structures for Humans™.

The Validator component provides tools to validate values following the JSR-303 Bean Validation specification.

The JSON Schema I-D sources

ForgJs is a javascript lightweight object validator. Go check the Quick start section and start coding with love

Featureful configuration management library for Node.js

An idiomatic Go (golang) validation package. Supports configurable and extensible validation rules (validators) using normal language constructs instead of error-prone struct tags.

Phone number functionality for Laravel

Drop in user input validation for your iOS apps.