typestack/class-validator

Health v2 · maintenance only

Adoption not part of the score

11833 stars · 847 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A TypeScript library providing decorator-based and non-decorator-based property validation for classes, built on validator.js. It supports nested objects, arrays, conditional validation, validation groups, and custom validators, and works in both browser and Node.js environments.

Use cases

• validate request DTOs in a NestJS API
• validate class properties with decorators in TypeScript
• validate nested objects and arrays before persisting
• reject invalid form input on the server
• add custom validation rules to class fields
• validate plain objects against a class schema

When to choose

• you use TypeScript classes and want declarative, decorator-based validation
• you need rich built-in rules plus custom validators, groups, and nested object validation
• you want validation that works in both Node.js and the browser

When to avoid

• you prefer schema-based validation without decorators (e.g. Zod or Joi)
• your project is plain JavaScript without decorator support
• you only need lightweight runtime type checking

Facets

library · maturity stable

form-handling developer-tools web-development backend frontend developer-tools browser cross-platform validation decorators class-validator typescript dto-validation validatorjs nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="typestack/class-validator")