Validation GitHub Repositories (2026) · Open Source Tools

JSONSchema (draft 2020-12, draft 2019-09, draft-7, draft-6, draft-4) Validation using Go

🚀 Configurable framework agnostic plain Ruby 📨 email validator/verifier. Verify email via Regex, DNS, SMTP and even more. Be sure that email address valid and exists.

Yet Another Validation for Java (A lambda based type safe validation framework)

A Typescript framework to help you get an API server up and running with I/O schema validation and custom middlewares in minutes.

A set of useful Laravel validation rules

The Laravel-Validate package enhanced Laravel validation capabilities with custom rules and methods for simplified and efficient validation logic

🦩 Joi like validations for TypeScript

:credit_card: ruby gem for validating credit cards, generating credit card numbers, Luhn checks

Aplus Framework Validation Library

Validate and sanitize arrays and objects.

Type annotations for specifying, validating, and serializing arrays with arbitrary backends in Pydantic (and beyond)

Brazilian documents validator for Go: CPF, CNPJ, CEP, IE, CNJ, NF-e and more

A library for using FluentValidation with Blazor EditForm components. Provides seamless integration between FluentValidation and Blazor forms with support for real-time validation, nested objects, async validation, and rule sets.

Rspec matchers to test ActiveModel validation that follows BDD.

Frames iOS: making native card payments simple

Framework-agnostic JavaScript library that generates and validates forms from JSON Schema, with zero runtime dependencies.

Node.js module for parsing and validating UK postcodes

A modern and lightweight library for working with email addresses in Java

DevExpress XAF (eXpressApp) extension framework. 𝗹𝗶𝗻𝗸𝗲𝗱𝗶𝗻.𝗲𝘅𝗽𝗮𝗻𝗱𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸.𝗰𝗼𝗺, 𝘆𝗼𝘂𝘁𝘂𝗯𝗲.𝗲𝘅𝗽𝗮𝗻𝗱𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸.𝗰𝗼𝗺 and 𝘁𝘄𝗶𝘁𝘁𝗲𝗿 @𝗲𝘅𝗽𝗮𝗻𝗱𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸 and or simply 𝗦𝘁𝗮𝗿/𝘄𝗮𝘁𝗰𝗵 this repository and get notified from 𝗚𝗶𝘁𝗛𝘂𝗯

GraphQL Router / API Gateway framework written in Golang, focussing on correctness, extensibility, and high-performance. Supports Federation v1 & v2, Subscriptions & more.