express-validator/express-validator

Health v2 · maintenance only

Adoption not part of the score

6236 stars · 626 forks observed · 2026-08-28

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

express-validator is an Express.js middleware wrapping the validator.js library for request validation and sanitization. It lets you declare validation rules for route parameters, query strings, and request bodies in Express applications.

Use cases

• validate request bodies in express apis
• sanitize user input to prevent xss
• validate query params and route params
• add input validation middleware to express routes
• check email and url formats in nodejs forms

When to choose

• you build Express.js APIs and need declarative request validation
• you want sanitization and validation in one middleware
• you prefer validator.js rules with a fluent chainable API

When to avoid

• you use Fastify, Koa, or a non-Express framework
• you need schema-based validation like Joi or Zod
• your app does not run on Node.js 14 or newer

Facets

library · maturity stable

middleware form-handling security web-development backend apis express validation sanitization validator-js request-validation nodejs javascript

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