JSPM

Type check values

Validates if a value is a number.

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.

URI validation functions

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

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

A tiny javascript type testing tool

Runtime validation for static types

An object schema merger/validator

Detect Filetype by bytes

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

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

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

Validate JSON

Generate fast-check arbitraries from Zod schemas.

TypeScript class that validates UK bank account details using the modulus checking algorithm.

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

Function argument validation for humans

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

A fast and easy to use JSON Schema validator

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

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

A family of specs for interoperable TypeScript

Validates if a value is an array.

Validates if a value is an integer.

validation library for nodejs, inspired by laravel.

JSON Safe Parser & Schema Validator

Check password strength

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

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

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

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

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

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

Blazing fast input validation and transformation ⚡

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

Validation rule for GraphQL query complexity analysis

A fast Luhn algorithm for validating credit cards

Check if a string is a scoped npm package name

Generates a random phone number following the E.164 international standard

Parser and validator for US and Canadian phone numbers

Express middleware for the validator module.

Another JSON Schema Validator

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

Build functions in standardized containers.

Validate NHS numbers in various guises

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

Type check values: `is.string('🦄') //=> true`

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

Standard Number Validation

Schema for data modeling & validation

Format validation for Ajv v7+

Check if a number is a valid Australian Business Number (ABN)

Runtime type-checking for JavaScript.

Utility methods for formatting and validating credit cards

A beautiful command-line prompt for node.js

Validates if a value is a function.

Provides common EAN 13 barcode related features.

Painless forms for Vue.js

Validates if a value is an integer array.

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

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

The fastest JS validator library for NodeJS

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

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.

React hooks and utility functions for parsing and validating phone numbers.

A package for handling Czech and Slovak Personal ID

Utilities to format and customize Zod error messages

Type guards

Performant, flexible and extensible forms library for React Hooks

A general purpose javascript library for credit card number validation and formatting. Based on https://github.com/jondavidjohn/payform and https://github.com/stripe/jquery.payment. Usable in React Native and Node.

String validation and sanitization

Wrap zod validation errors in user-friendly readable messages

Object schema validation

Angular directives for formatting and validating credit card inputs

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

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

Validation for your environment variables

Conform view adapter for react

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

Conform helpers for integrating with Zod

Check if a number is a valid Australian Company Number (ACN)

Regular expression matching for email addresses. Maintained, configurable, more accurate, and browser-friendly alternative to email-regex. Works in Node v14+ and browsers. Made for Spam Scanner and Forward Email.

Email address and domain validation

Express middleware to validate requests using zod schema's.

Schema Validation with typescript type inference.

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

Ajv class for JSON Schema draft-04

JavaScript script to validate and parse Swedish personal identity numbers and corporate identity numbers. Written in TypeScript and includes types.

Validates if a value is a string primitive.

The modular and type safe schema library for validating structural data

A full TypeScript EAN, UPC, IMEI, EID, ISBN & card validation tool

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

Core module of JSON Forms

Convert Ethereum address to a checksummed address

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

Second generation object or request validator for node.js

A tiny Node HTTP(S) request wrapper, for JSON requests and responses

RDF SHACL validator

Making SvelteKit forms a pleasure to use!

Checks existence of email addresses

A rich and efficient node validation library for String, Number, Date and Javascript Objects

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

Disable introspection in graphql-js with a validation rule

GitHub's GraphQL Schema with validation. Automatically updated.

Email address and domain validation

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

Build industry leading Vue forms 10x faster.

A simple, extensible object property validator for node.js. Supports express.js.

Build forms in React, without the tears

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

Another JSON Schema Validator

Validates password according to flexible and intuitive specifications

React forms with validation as used in GuestBell

Extends Zod with metadata

ESLint plugin that validates data using JSON Schema Validator.

Convert Swagger 2.0 definitions to OpenApi 3.0 and validate

Assert that a Node-API value is a specified Node-API data type.

Parser/validator for OpenAPI 3.x definitions

An Angular Material package for entering and validating international telephone numbers. It adds a flag dropdown to any input, detects the user's country, displays a relevant placeholder and provides formatting/validation methods.

A (XSD) schema validator for nodejs

Reactive MobX Form State Management

A pure-JS Schematron implementation for Node, browsers and CLI

Configurable, input validated routing for koa.

A command-line JSON, YAML and TOML validator that's on your wavelength

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

Validate the api to your functions to help people use them correctly. This is pretty much React's propTypes without React.

0-Deps, simple, fast, for browser and node js object schema validator

Joi extension for dates

Validator functions for many types of input, intended for use with express

Generate Zod schemas from Drizzle ORM schemas

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

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

Check if a URL exists.

Library for checking spaces in files

node-restify-swagger =======================

Configurable custom GraphQL Scalars (string, number, date, etc) with sanitization / validation / transformation in TypeScript.

Check if a string can be used as a JavaScript variable name

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

angular credit card library

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

General purpose validation library for JavaScript

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

Validates if a value is a JavaScript object.

Standard assertion utilities.

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.

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

Validates if a value is a nonnegative number.

Validates if a value is a positive number primitive.

Thin wrapper around joi that defaults to stricter validation.

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

NodeJS data validations

Test if a value is an Error object.

A set of validator functions that check common polish numbers.

An OpenAPI v3.0 development workflow assistant

Powerful object and string validation in Javascript.

Validates if a value is an array of primitive numbers, excluding NaN.

A full TypeScript EAN, UPC, IMEI, EID, ISBN & card validation tool

A simple way to validate tracking number for the following couriers.

Validation library inspired by Laravel's Validator

A general purpose library for building credit card forms, validating inputs, and formatting numbers.

A TypeScript library for verifying and parsing national ID numbers - supports 80 countries across 6 continents including USA, UK, France, Germany, Japan, China, India, Brazil, and many more

Postal Codes

Validate cron expressions

Starlight plugin to validate internal links.

UK Postcode helper methods

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

Validation utilities

A JavaScript plugin for entering and validating international telephone numbers

Validate NPI numbers for healthcare physicians or organizations.

The best possible way to verify and validate an email address.

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

Angular Material international telephone input

User validations for npm

Validates Australian Business Number (ABN), Australian Company Number (ACN), Australian Registered Body Number (ARBN), Australian Tax File Number (TFN) & Australian Medicare Number

Validates if a value is undefined.

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

Configurable, input validated routing for koa.

Assert that two Node-API data types are equal.

A (XSD) schema validator for nodejs

C utilities for asserting that a Node-API call returns an "ok" status.

Declarative validations for JavaScript

Creates Zod types from JSON Schema at runtime

Schema validator for yaml files

Validate environment variables with schema-based parsing, defaults, and clear runtime errors.

Validates if a value is a Buffer object.

check if a number is a positive integer

Fast runtime type validator, converter and io (encoding/decoding) library

React Hook Form error message component

React Hook Form dev tool to help debugging forms

Check whether a string is a valid HTTP URL

Ember computed property based validation library

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

Minimal JavaScript type checking library

Validates if a value is a nonnegative integer.

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

Format, validate and generate CNPJ numbers

A tiny vanilla javascript form validation library

Hash a stream of data, then validate

Node.js utility tool for creating and checking subresource integrity

Common error classes and utility functions

React component to provide validation states to form fields

US Driver's License validation via https://ntsi.com/drivers-license-format/

The CLI for working with JSON Schema. Covers formatting, linting, testing, and much more for both local development and CI/CD pipelines

A Luhn (mod 10) algorithm module for credit card number validation.

Helpers to simplify nodejs code on FASS environments

Creates typebox code from JSON schemas

Validates if a value is array-like.

Email Verification that's astonishingly easy and low-cost. See https://emailable.com for details.

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

Additional functionality to [kind-of][] type check utility. Support promises, generators, streams, errors.

Verify if geographic coordinates are valid 🌎 (latitude, longitude, both).

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

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

A lightweight JavaScript widget with zero dependencies that performs real-time email address validation using the Verifalia email verification service. This widget integrates seamlessly with any web form to swiftly identify and eliminate invalid, undelive

Validates if a value is matrix-like.

Validate NHS numbers in various guises

A React component for input text field

Validates if a value is a positive integer.

Card validation helpers for card number, expiry and CVV.

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.

validates style objects by ensuring they only have valid keys

An intuitive standard IAB Vast XML generation API. Complient with specifications Vast 2.0 / 3.0 / 4.0

Simple validations for node and the browser.

Fela plugin to validate style objects

Validate your BPMN diagrams based on configurable lint rules

Validates if a value is ndarray-like.

⛑️ JSON serialization should never fail

Interactive environment variable checker and setup wizard. Sync .env files with validation (Email, URL, Regex) and prompts.

Angular custom directives for validation

Basic javascript object validation

An API wrapper for the NeverBounce API

Zod Phone Number is validation schema for Zod

An incremental regular expression parser in JavaScript; useful for input validation, RegExp

Strict URL sanitization with security-focused validation

Validates cron expressions

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

Framework to create angular application

Verify HTTP requests sent to an Alexa skill are sent from Amazon

Swagger 2.0 and OpenAPI 3.0 command-line tool

Typescript API client with autocompletion and zod validations

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

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

A validation module for browsers and Node.js to validate an American Bankers Association Routing Number used in ACH payments.

Helper library to create JSON Schemas in a concise way.

Validates if a value is NaN.

A simple validation module for french SIRET and SIREN numbers

Performs a runtime check that guarantees the type and value of properties in some scopes