validation

Validation library with type-safe schemas and rules

Advanced fetch client builder

A friendly library for parsing HTTP request arguments, with built-in support for popular web frameworks, including Flask, Django, Bottle, Tornado, Pyramid, webapp2, Falcon, and aiohttp.

A joi validation middleware for Express.

Validate Golang request data with simple rules. Highly inspired by Laravel's request validation.

A simple, fluent, extensible, and fully customizable library for throwing exceptions for projects using .NET 6+

VineJS is a form data validation library for Node.js

🚀 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.

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

Go with Zod inspired simple schema validation

The modular and type-safe form library for SolidJS, Qwik and Preact

Swagger 2.0 and OpenAPI 3.0 parser/validator

A fast, flexible PHP validation class that works anywhere and validates any data.

⚔ Go package for data validation and filtering. support Map, Struct, Form data. Go通用的数据验证与过滤库，使用简单，内置大部分常用验证、过滤器，支持自定义验证器、自定义消息、字段翻译。

The lightweight, schema-first, and fully type-safe form library for React, Solid, Vue, Svelte and more.

Reactive MobX Form State Management

An extensible form library for Svelte, Solid and React

A Node.js module for in-App-Purchase for iOS, Android, Amazon and Windows.

Go package containing implementations of efficient encoding, decoding, and validation APIs.

Digital Signature Service : creation, extension and validation of advanced electronic signatures

A Meteor package that extends Mongo.Collection to provide support for specifying a schema and then validating against that schema when inserting and updating.

📐 Validating data structures against a given Schema.

Easily validate your Properties with Property Wrappers 👮

Automatically validating Eloquent models for Laravel

The official Firely .NET SDK for HL7 FHIR

Meteor integration package for simpl-schema

🤝 Design by contract for Python. Write bug-free code. Add a few decorators, get static analysis and tests for free.

A powerful validation library for Rust

PHP Standalone Validation Library

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