While JSON is probably the most popular format for exchanging data, JSON Schema is the vocabulary that enables JSON data consistency, validity, and interoperability at scale.

Code to Electronics. Build electronic circuit boards from code.
atopile is a language and toolchain to describe electronic circuit boards with code. By replacing the point and click schematic interface with code, we introduce software development workflows like reuse, validation and automation to the world of electronics.

• atopile @ GitHub.

Valinor takes care of the construction and validation of raw inputs (JSON, plain arrays, etc.) into objects, ensuring a perfectly valid state. It allows the objects to be used without having to worry about their integrity during the whole application lifecycle.

The validation system will detect any incorrect value and help the developers by providing precise and human-readable error messages. The mapper can handle native PHP types as well as other advanced types supported by PHPStan and Psalm like shaped arrays, generics, integer ranges and more.

• Valinor @ GitHub.

⚡️ The open-source form framework for Vue.

FormKit is a form-authoring framework for Vue developers that makes building high quality production-ready forms 10x faster. It is easy-to-learn and ships with production-ready scaffolding like inputs, forms, submission and error handling, and validation rules. To learn more check out the documentation website at: formkit.com.

• FormKit @ GitHub.

Vest Validations Framework.

Vest is a declarative validations framework designed to simplify the process of writing and maintaining form validations for your web application. Inspired by popular unit testing libraries such as Mocha and Jest, Vest allows developers to describe their validation requirements using a suite-like syntax, separating validation logic from feature logic to create more maintainable and readable code.

• Vest @ GitHub.

The Validation class is a PHP utility for performing data validation and error handling. It is designed to validate user-provided data against a set of rules and return error messages when validation fails.

• How to Simplify Data Validation in PHP With ValidationMyPhp @ HackerNoon.

The modular and type safe schema library for validating structural data robot.

Validate unknown data with Valibot, the open source schema library with bundle size, type safety and developer experience in mind.

Valibot @ GitHub

TypeScript-first schema validation with static type inference

Zod is a TypeScript-first schema declaration and validation library. I'm using the term "schema" to broadly refer to any data type, from a simple string to a complex nested object.

Zod @ GitHub.

VineJS is a form data validation library for Node.js. You may use it to validate the HTTP request body in your backend applications.

VineJS @ GitHub.