Validation GitHub Repositories (2026) · Open Source Tools

AI-safe .env files: Schemas for agents, Secrets for humans.

The home of the CUE language! Validate and define text-based and dynamic configuration

Modern JavaFX CSS theme collection with additional controls.

A configuration as code language with rich validation and tooling.

KCL Language Core and API

JSON Schema validator that compiles to plain JavaScript, still runs where code generation is blocked, and can be compiled away at build time. Passes the full official test suite. https://socket.dev/npm/package/ata-validator

📋 React Hooks for form state management and validation (Web + React Native)

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

+30,000 free and disposable email domains in a single list, validated against DNS every day.

CakePHP: The Rapid Development Framework for PHP - Official Repository

A high-performance JSON Schema validator for Rust

A modern PHP library for validating in-app purchases from the Apple App Store (including legacy iTunes), Google Play and Amazon Appstore

A joi validation middleware for Express.

Data validation using Python type hints

The form framework for coding agents

A light-weight, flexible, and expressive statistical data testing library

Pure Python HWPX automation: read, edit, generate, and validate documents without Hancom Office.

Progressively enhance HTML forms with React. Build resilient, type-safe forms with no hassle using web standards.

Automate Kubernetes Configuration Editing

Date and time validation plugin for ActiveModel and Rails. Supports multiple ORMs and allows custom date/time formats.