The zod Plugin: adds an example validation schema to a generated express-ts project.

Spec-html validation schema and engine. The TypeScript module form of the spec-* vocabulary's grammar — used by @spectastic/cli, MCP servers, and editor extensions.

Composable/extendable validation schema, inspired by yup/joi

💠 Modify and transform validation schema with a unified API

Reusable JSON Schema (Draft 04) validation library for Expo

CLI tool for .env validation, schema checking, drift detection, environment diff, git audit, and codebase scanning. Zero-code-change alternative to dotenv-safe and envalid.

Zod validation schema generator. Auto-generates validation schemas from Arche CMS field definitions.

Decorator-based property validation for classes.

An object schema merger/validator

The official JSON schema converter for Valibot

React Hook Form validation resolvers: Yup, Joi, Superstruct, Zod, Vest, Class Validator, io-ts, Nope, computed-types, TypeBox, arktype, Typanion, Effect-TS and VineJS

Governance Commons reference implementation — ONS name validation, schema utilities, and shared types for TypeScript/JavaScript adopters.

[](https://npmjs.org/package/@standard-community/standard-json "View this project on NPM") [

Dead simple Object schema validation

Schema for the protocol between CDK framework and CDK CLI

JSON Schema TypeScript definitions with complete inline documentation.

Convert YAML specs into Cypress tests with validation, schema tooling, and custom command support.

A public domain JSON Schema validator for JavaScript

YAML language server

Wrap zod validation errors in user-friendly readable messages