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10 Best JavaScript Data Validation Libraries

List hand-picked by Openbase Experts
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zod

zod

TypeScript-first schema validation with static type inference

1.6M
17.8K
Built-in
MIT
ajv

ajv

The fastest JSON schema Validator. Supports JSON Schema draft-04/06/07/2019-09/2020-12 and JSON Type Definition (RFC8927)

84.6M
12.1K
Built-in
MIT
joi

joi

The most powerful data validation library for JS

7.1M
19.6K
Built-in
BSD-3-Clause
express-validator

express-validator

An express.js middleware for validator.js.

478K
5.7K
Built-in
MIT
nv

nope-validator

A small, simple, and fast JS validator. Like, wow that's fast. 🚀

3.5K
296
Built-in
MIT
val

validatorjs

A data validation library in JavaScript for the browser and Node.js, inspired by Laravel's Validator.

48.4K
1.6K
DefinitelyTyped
MIT
niv

node-input-validator

Validation library for node.js

6K
80
No support
ISC
dec

decoders

Elegant validation library for type-safe input data (for TypeScript and Flow)

15K
333
No support
MIT
swagger-parser

swagger-parser

Swagger 2.0 and OpenAPI 3.0 parser/validator

695K
874
Built-in
MIT
schema-typed

schema-typed

Schema for data modeling & validation

40K
173
Built-in
MIT
cel

celebrate

A joi validation middleware for Express.

59.7K
1.2K
Built-in
MIT
openapi-validator-middleware

openapi-validator-middleware

Input validation using Swagger (Open API) and ajv

58.8K
136
Built-in
Apache-2.0
jre

json-rules-engine

A rules engine expressed in JSON

74.9K
1.9K
Built-in
ISC
ev

express-validation

express-validation is an express middleware that validates a request and returns a response with errors; if any of the configured validation rules fail.

54.2K
363
Built-in
MIT
ejv

express-json-validator-middleware

Express middleware for validating requests against JSON schema

14.9K
139
Built-in
MIT
ske

skema

🛰 Skema provides a handy & composable way to validate / transform / purify the input data.

10.5K
364
No support
MIT
eov

express-openapi-validate

Express middleware to validate requests based on an OpenAPI 3 document

8.6K
70
Built-in
Apache-2.0
obe

obey

🔨 Asynchronous JavaScript Data Modelling and Validation

2K
200
No support
MIT
openapi-enforcer-middleware

openapi-enforcer-middleware

An express middleware that makes it easy to write web services that follow an Open API specification.

1.5K
16
Built-in
Apache-2.0
isv

isvalid

Asynchronous JavaScript validation library for Node.js and browsers.

678
47
No support
MIT
vj

valid.js

📝 A library for data validation.

535
607
No support
MIT
ny

next-yup

> Simple validation for [Next.js](https://nextjs.org) API routes using [Yup](https://github.com/jquense/yup)

202
Built-in
MIT
datalize

datalize

Parameter, query, form data validation and filtering for NodeJS.

59
55
No support
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