Flexible Python configuration system. The last one you will ever need.

OvO is a Dart-first schema declaration and validation library.

Schema based validator for AdonisJS

Elixir library for declarative data description and validation

TypeScript friendly Data validator for JavaScript.

OpenAPI 3 parser, JSON schema and request validator.

🛡️ EnvGuard – A powerful NPM package that validates your .env files against a predefined schema, ensuring all required environment variables are set and secure. Prevent misconfigurations in production by detecting missing values, insecure defaults, and enforcing .env.example consistency across teams.

A FAST C++ library to validate the HTTP requests against the OpenAPI specifications of the REST server.

Themis is a validation and processing library that helps you always make sure your data is correct.

A simple object validator for tiny schemas

Schema validator in go

Simplify AJV Schema Validation with TypeScript

Feathers hooks for schema validation using fastest-validator as a core validator

This class validates JSON payloads by using predefined schema based on basic necessary data types. Data types validation can be extended by creating new classes and new constraints can be added by writing new functions in Constraints class.

Another schema validator :)

GraphQL Workshop Tutorial by team API platform

Schema.org document checker

Validate schema: Simplifying schema validation for JSON and YAML.

A FAST Python pacakage to validate the HTTP requests against the OpenAPI specifications of the REST server.

🔥 JSON Schema Validation Package for Java.