JSPM

Another JSON Schema Validator

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

Format validation for Ajv v7+

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

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

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

An object schema merger/validator

Type check values

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

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

String validation and sanitization

Performant, flexible and extensible forms library for React Hooks

A standard interface for TypeScript schema validation libraries

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

Object schema validation

Email address and domain validation

Wrap zod validation errors in user-friendly readable messages

Ajv class for JSON Schema draft-04

The modular and type safe schema library for validating structural data

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

Email address and domain validation

A fast and easy to use JSON Schema validator

Convert Swagger 2.0 definitions to OpenApi 3.0 and validate

Build forms in React, without the tears

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

JSON Safe Parser & Schema Validator

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

URI validation functions

Validate JSON

Another JSON Schema Validator

Parser/validator for OpenAPI 3.x definitions

Validates if a value is an integer.

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

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

General purpose validation library for JavaScript

Express middleware for the validator module.

Validates if a value is an array.

Validates if a value is a function.

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

Check if a string is a scoped npm package name

Function argument validation for humans

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

Validates if a value is an integer array.

Generate Zod schemas from Drizzle ORM schemas

Validates if a value is a number.

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

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

User validations for npm

A tiny javascript type testing tool

A JavaScript plugin for entering and validating international telephone numbers

A beautiful command-line prompt for node.js

Painless forms for Vue.js

React Hook Form error message component

Declarative validations for JavaScript

React Hook Form dev tool to help debugging forms

A React component for input text field

Hash a stream of data, then validate

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

Validation rule for GraphQL query complexity analysis

React component to provide validation states to form fields

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

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

Creates Zod types from JSON Schema at runtime

Validation for your environment variables

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.

Detect Filetype by bytes

validates style objects by ensuring they only have valid keys

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

Blazing fast input validation and transformation ⚡

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

Runtime validation for static types

Typescript API client with autocompletion and zod validations

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

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

Validate JSON

Simple validations for node and the browser.

Swagger 2.0 and OpenAPI 3.0 command-line tool

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

vee-validate integration with zod schema validation

Utilities to format and customize Zod error messages

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

Validates cron expressions

Client-side form validation made easy

Dead simple fluent JavaScript validation library

Form Validation for Vue.js

Validate a response according to an openapi schema.

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.

Core module of JSON Forms

Validate postcodes based on country

Form data validation library for Node.js

Conform view adapter for react

Schema for data modeling & validation

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

Strict URL sanitization with security-focused validation

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

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

Joi extension for dates

Making SvelteKit forms a pleasure to use!

Conform helpers for integrating with Zod

Runtime type-checking for JavaScript.

Validate OpenApi specifications against their JSON schema

TypeScript compatible runtime type system for IO validation

Validates password according to flexible and intuitive specifications

The framework agnostic core of FormKit

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

Build functions in standardized containers.

Utility to wrap a FormKitNode in a dependency tracking observer proxy

Build industry leading Vue forms 10x faster.

Development tools for FormKit.

ESLint plugin that validates data using JSON Schema Validator.

The fastest JS validator library for NodeJS

Validation rules for FormKit

Quick and easy Smarty address validation.

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

Forms utilities for PrimeUI Libraries

Validates mint.json files

Generates zod schemas from Prisma models with advanced validation

Validation library inspired by Laravel's Validator

Commonly shared types for FormKit

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

Universal adapter for schema validation

Shared utilities for FormKit packages

Validate JSON

Clean featherweight state 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.

Reusable adapter for class-validator classes

Internationalization layer for FormKit.

Validation plugin for FormKit

Validate cron expressions

vee-validate integration with yup schema validation

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

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

A joi validation middleware for Express.

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

Postal Codes

Assertion library for form validations

A fast Luhn algorithm for validating credit cards

Parse your environment with Zod schemas

Png validator checks Png files for corruption

Validate GraphQL fields

XML-Tools Common Utilities

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

Official vee-validate nuxt module

Azure OpenAPI Validator

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

Azure OpenAPI Validator

Azure OpenAPI Validator

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

Generate fast-check arbitraries from Zod schemas.

Useful proptypes for react components

Validates if a value is a Buffer object.

Validate object properties in javascript.

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

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

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

Validates if a value is a string primitive.

Validate openapi documents.

Validates if a value is a nonnegative integer.

Type guards

JSON Schema fluent API

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

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

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

Validates if a value is array-like.

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

Standard assertion utilities.

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

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

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

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

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

Validates if a value is a positive integer.

Validates if a value is matrix-like.

Card type definitions and methods for creditcards

✅ Vite plugin for validating your environment variables

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

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

build schema with validators for each endpoint

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

An OpenAPI v3.0 development workflow assistant

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

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

Joi extension for dates

Yaml input field with validation and syntax highlighting as React Component

Validates if a value is ndarray-like.

Minimal JavaScript type checking library

Reactive MobX Form State Management

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 Pothos plugin for adding schema based validation

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

validate express application inputs and parameters using joi

Validate JSON

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

Utility methods for formatting and validating credit cards

Type signature parser for typify

A form input builder and validator for React

Stream-based library for parsing and manipulating subtitles

Generate Typebox schemas from Drizzle ORM schemas

Yup, dead simple password validation.

An Express middleware to validate requests against JSON Schemas

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

Test if a value is an Error object.

Ember computed property based validation library

Express middleware to validate requests using zod schema's.

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

A string formatter and validator based on masks

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

Changesets for your local state

Form component and utils for easy form validation in remix

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

A Pothos plugin for adding argument validation

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

A (XSD) schema validator for nodejs

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

Backstage entity validator library

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

Integrate [cz-customizable](https://github.com/leoforfree/cz-customizable) config with [ghooks](https://github.com/gtramontina/ghooks) or [husky](https://github.com/typicode/husky) to use a single configuration for commit message generation AND commit mes

An internationalized hostname validator as defined by RFC5890, RFC5891, RFC5892, RFC5893, RFC3492 and UTS#46

Node.js middleware to validate Host and Referer headers in HTTP requests and protect against DNS rebinding attacks.

UK Postcode helper methods

Starlight plugin to validate internal links.

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

Schema Validation with typescript type inference.

Backstage entity validator

Capture form validation back from the browser

openapi-io-ts core package

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

Optional features you can add to your FormKit inputs.

Schema validator for yaml files

Standard Number Validation

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

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

Converts json-schema to Joi schema.

An object shape validation utility.

Express middleware to validate request based on an OpenAPI 3 document

Check password strength

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

Validate your BPMN diagrams based on configurable lint rules

OpenAPI code generation tool with validation powered by io-ts

Extends Zod with metadata

Check if the given value is of the particular type or types.

Typescript express server

Validator of HTTP transactions (JavaScript implementation)

Fela plugin to validate style objects

Core validator component for react forms.

A client for the App Store Server API

Configurable, input validated routing for koa.

Core package of uniforms.