JSPM

Another JSON Schema Validator

TypeScript-first schema declaration and validation library with static type inference

Format validation for Ajv v7+

Give me a string and I'll tell you if it's a valid npm package license string

A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

Check if a protocol requires a certain port number to be added to an URL.

Give me a string and I'll tell you if it's a valid npm package name

A library for parsing IPv4 and IPv6 IP addresses in node and the browser.

Type check values

Utilities for determining if characters belong to character classes defined by the XML specs.

An object schema merger/validator

Performant, flexible and extensible forms library for React Hooks

String validation and sanitization

Object schema validation

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

Email address and domain validation

Wrap zod validation errors in user-friendly readable messages

A standard interface for TypeScript schema validation libraries

Ajv class for JSON Schema draft-04

A simple and composable way to validate data in JavaScript (and TypeScript).

A fast and easy to use JSON Schema validator

Build forms in React, without the tears

JSON Safe Parser & Schema Validator

URI validation functions

Swagger 2.0 and OpenAPI 3.0 parser and validator for Node and browsers

Parser/validator for OpenAPI 3.x definitions

The modular and type safe schema library for validating structural data

Convert Swagger 2.0 definitions to OpenApi 3.0 and validate

Validate JSON

Email address and domain validation

Another JSON Schema Validator

A type checking library where each exported function returns either true or false and does not throw. Also added tests.

General purpose validation library for JavaScript

For use with React PropTypes. Will error on any prop not explicitly specified.

Validates if a value is an array.

Validates if a value is a function.

Validates if a value is an integer array.

Validates if a value is a number.

Validates if a value is an integer.

Swagger 2.0 and OpenAPI 3.0 parser and validator for Node and browsers

Function argument validation for humans

Provides a fast, pretty robust e-mail validator. Only checks form, not function.

Express middleware for the validator module.

Validate and visualize dependencies. With your rules. JavaScript, TypeScript, CoffeeScript. ES6, CommonJS, AMD.

Generate Zod schemas from Drizzle ORM schemas

A tiny javascript type testing tool

Check if a string is a scoped npm package name

Validate an email address according to RFCs 5321, 5322, and others

User validations for npm

Featureful configuration management library for Node.js (nested structure, schema validation, etc.)

A beautiful command-line prompt for node.js

Painless forms for Vue.js

A JavaScript plugin for entering and validating international telephone numbers

Hash a stream of data, then validate

Declarative validations for JavaScript

React Hook Form error message component

React Hook Form dev tool to help debugging forms

React component to provide validation states to form fields

check if a string is a valid JSON string without using Try/Catch

Validation rule for GraphQL query complexity analysis

A React component for input text field

A simple and composable way to validate data in JavaScript (and TypeScript).

Validation for your environment variables

Swagger 2.0 and OpenAPI 3.x parser and validator for Node and browsers

Detect Filetype by bytes

Blazing fast input validation and transformation ⚡

Runtime validation for static types

validates style objects by ensuring they only have valid keys

cron-validate is a cron-expression validator written in TypeScript.

A json validator that has an option to check for duplicated keys

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

Contains JavaScript & TypeScript object models for Microsoft Power BI JavaScript SDK. For each model there is a TypeScript interface, and a validation function to ensure and object is valid.

Validate JSON

Validates cron expressions

Client-side form validation made easy

Swagger 2.0 and OpenAPI 3.0 command-line tool

A temporary custom copy of https://github.com/csstree/csstree

Effortlessly convert your JSON Object to JSON Schema, Mongoose Schema, or a Generic template for quick documentation / upstart.

GitHub’s GraphQL Schema with validation. Automatically updated.

Generate fast-check arbitraries from Zod schemas.

Typescript API client with autocompletion and zod validations

Customizable and hackable json-validator and json-schema utilities for traversal, data generation and validation

Utilities to format and customize Zod error messages

Dead simple fluent JavaScript validation library

vee-validate integration with zod schema validation

Simple validations for node and the browser.

Core module of JSON Forms

Form Validation for Vue.js

A set of opinionated helpers built on top of the Constraint Validation API

Creates Zod types from JSON Schema at runtime

Validate postcodes based on country

A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

Joi extension for dates

Conform view adapter for react

Validate a response according to an openapi schema.

Form data validation library for Node.js

A joi validation middleware for Express.

TypeScript compatible runtime type system for IO validation

Schema for data modeling & validation

Conform helpers for integrating with Zod

Extends Zod with metadata

TypeScript-first schema declaration and validation library with static type inference

Validate any Bitcoin address - P2WSH, P2WPKH, P2SH, P2PKH - Mainnet & Testnet

Making SvelteKit forms a pleasure to use!

The framework agnostic core of FormKit

Quick and easy Smarty address validation.

Validates password according to flexible and intuitive specifications

Validate JSON

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

Build industry leading Vue forms 10x faster.

Utility to wrap a FormKitNode in a dependency tracking observer proxy

Development tools for FormKit.

A validation module for browsers and Node.js to validate credit card numbers against the luhn algorithm.

Shared utilities for FormKit packages

Runtime type-checking for JavaScript.

Strict URL sanitization with security-focused validation

The goal of the package is to provide lightweight tools for validating strings denotings dates and time. It includes ISO 8601 datestring validation, simple YYYY-MM-DD date validation and time validation in hh:mm:ss.fff format. See details in readme.

Validation plugin for FormKit

Clean featherweight state validation

The fastest JS validator library for NodeJS

ESLint plugin that validates data using JSON Schema Validator.

Commonly shared types for FormKit

Generates zod schemas from Prisma models with advanced validation

Forms utilities for PrimeUI Libraries

Validation rules for FormKit

XML-Tools Common Utilities

Azure OpenAPI Validator

Reusable adapter for class-validator classes

Azure OpenAPI Validator

Azure OpenAPI Validator

allows easy type enforcement for all JS types objects and classes. it is also extensible and provides simple to use type checks for your own custom classes and types

A fast Luhn algorithm for validating credit cards

Validates mint.json files

Build functions in standardized containers.

Validate GraphQL fields

Internationalization layer for FormKit.

Validation library inspired by Laravel's Validator

Universal adapter for schema validation

Official vee-validate nuxt module

vee-validate integration with yup schema validation

Validate OpenApi specifications against their JSON schema

Build a Yup schema object to validate models from a domain model schema (JSON or GraphQL)

Assertion library for form validations

Build, Validate, Route, Authenticate and Mock using OpenAPI definitions. Framework-agnostic

A simple wrapper around class-transformer and class-validator which provides nice and programmer-friendly API.

High-level validation library for Node.js (used in Waterline)

openapi-io-ts core package

Type guards

Validate HTML colors by 'name', 'special name', 'hex', 'rgb', 'rgba', 'hsl', 'hsla', 'hwb', 'lab' or 'lch' values

Validate object properties in javascript.

Parse your environment with Zod schemas

Useful proptypes for react components

JSON/CJSON/JSON5 parser, syntax and schema validator and pretty-printer.

Validates if a value is a nonnegative integer.

$merge and $patch keywords for Ajv JSON-Schema validator to extend schemas

Vue and Nuxt 2/3 isomorphic JSON editor, viewer, formatter and validator.

Postal Codes

The parser package for the Powertools for AWS Lambda (TypeScript) library.

Schema-Inspector is a powerful tool to sanitize and validate JS objects.

Validate Markdown frontmatter YAML against an associated JSON schema — remark-lint rule plugin

Validates if a value is a string primitive.

Yup, dead simple password validation.

Adds a phone number validation check to yup validator using google-libphonenumber.

A syntax sugar tool around Node fetch() API, tailored to work with TypeScript and response validators

Validates if a value is a number primitive and an integer.

OpenAPI code generation tool with validation powered by io-ts

Add-on to jQuery Validation to enable unobtrusive validation options in data-* attributes.

Validate cron expressions

Validates if a value is a number primitive, excluding NaN.

Validates if a value is a Buffer object.

Validates if a value is array-like.

An OpenAPI v3.0 development workflow assistant

Validates if a value is matrix-like.

Provides a fast company / work email validator by checking whether the email domain is in the free email provider list.

build schema with validators for each endpoint

[](https://github.com/webcat12345/ngx-intl-tel-input/actions/workflows/ci.yml) [![GitHub Pages](https://img.shields.io/badge/Demo-blue?logo=

Joi extension for dates

A package for detecting all duplicated property keys of a JSON string.

✅ Vite plugin for validating your environment variables

Zod schema generator plugin for Kubb, creating type-safe validation schemas from OpenAPI specifications for runtime data validation.

Type signature parser for typify

Validates if a value is a positive integer.

Put non-empty strings into arrays, turn empty-ones into empty arrays. Bypass everything else.

Ember computed property based validation library

Card type definitions and methods for creditcards

JSON Schema fluent API

Utility methods for formatting and validating credit cards

Create an error from the result of validate-glob-opts

Elegant and battle-tested validation library for type-safe input data for TypeScript

Starlight plugin to validate internal links.

Validate JSON

Backstage entity validator library

Validate openapi documents.

Validates if a value is ndarray-like.

Test if a value is an Error object.

Validate your forms, frontend, without writing a single line of javascript!

Express middleware to validate requests using zod schema's.

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

Backstage entity validator

A form input builder and validator for React

Yaml input field with validation and syntax highlighting as React Component

Stream-based library for parsing and manipulating subtitles

allows easy type enforcement for all JS types objects and classes. it is also extensible and provides simple to use type checks for your own custom classes and types

Standard assertion utilities.

Changesets for your local state

GTIN (UPC, EAN, ITF, etc.) utilities.

A string formatter and validator based on masks

Minimal JavaScript type checking library

Form component and utils for easy form validation in remix

An Express middleware to validate requests against JSON Schemas

Schema Validation with typescript type inference.

validate express application inputs and parameters using joi

Generate Typebox schemas from Drizzle ORM schemas

Simple validations with redux-form / react-final-form

Core validator component for react forms.

FormKit Pro — Form inputs and tools for high quality forms.

Adds a phone number validation check to yup using libphonenumber-js.

Configurable, input validated routing for koa.

Validate html using validator.w3.org/nu og html-validate

A library for generating safe, legit and random URL-safe IDs

Core utility for Felte's integration with front-end frameworks

A Pothos plugin for adding schema based validation

Adds pattern matching, optional properties, and several other helpers and types, to io-ts.

Simple validator for forms designed with material-ui v1/v3/v4/v5 components.

A command line JSON Schema validator that supports many file formats. Fork of jessedc/ajv-cli.

Validate your BPMN diagrams based on configurable lint rules

A React Component to display the success or failure of password strength rules, ideal for registration or password reset forms.

Express middleware to validate request based on an OpenAPI 3 document

Converts json-schema to Joi schema.

A lightweight framework and utility for building powerful forms in React applications

Optional features you can add to your FormKit inputs.

Validation and warning infrastructure for Sanity projects

A Pothos plugin for adding argument validation

UK Postcode helper methods

Schema validator for yaml files

Sanely validate email addresses, based on HTML5's definition of email addresses

Standard Number Validation

An object shape validation utility.

Enhanced type safety via validation for all route params in React Router v7.

Fast input validation middleware using OpenAPI 2.0 (formerly Swagger) and 3.0 definitions file and ajv

A client for the App Store Server API

Core package of uniforms.

Wrapper for `xmllint`. Easy validation of XML. XML Schemas and DTDs supported. Zero dependencies.

Check password strength

Reactive MobX Form State Management

Validate element templates based on JSON Schema

```diff -Maintener wanted ``` Validation for REST Services built with [node-restify](https://github.com/mcavage/node-restify) in node.js

A (XSD) schema validator for nodejs

An extensible form library for Svelte

Text input mask for React Native on iOS, Android and web. Synchronous and easy formatting without hustle