Lint an npm or yarn lockfile to analyze and detect issues
OpenAPI 3 mock server. Validates SDKs against OpenAPI specs with clear error attribution.
Employer Identification Number validator and masker
Detect and validate credit card numbers.
An utility to validate events and responses using JSON Schemas
A simple react form validator inspired by Laravel validation.
OpenAPI request, parameters, headers and response validator methods
mashup of lodash with checkit module
AdiaUI A2UI validator — JSON Schema structural validation plus catalog-aware semantic validation (component exists, props match YAML). Split out from the compose engine so non-compose tooling (tests, MCP validator tools, CI gates) can depend on validation
A lightweight utility for validating Stacks (STX) addresses and transaction IDs with TypeScript support.
TypeScript definitions for vnu-jar
Library for checking spaces in files
JavaScript client for the System program
Wallet address validator for Bitcoin and other Altcoins.
BIC (Business Identifier Code) format validator
Validate OpenApi specifications against their JSON schema
Additional JSON-Schema keywords for Ajv JSON validator
Validate CSS via W3C's service
Validator component for Vue.js
[Mustache](https://www.npmjs.com/package/mustache) doesn't validate the data used in templates which means there is a low amount of safety when the data is managed/defined in another place or there are typos, e.g. for the following:
Check the markup validity of HTML files using the W3C validator
Syntactically validates bundle structure and signatures.
A module that offers validation and parsing for non-standard UIDL structures
A package for validating slate objects