#validation

A Nest.js HTTP exceptions filter returning RFC 9457 / RFC-7807 responses

Opinionated framework for Django - batteries included

OpenAPI 3 and 3.1 schema generator and validator for Hono, itty-router and more!

Type-safe combinatorial CLI parser for TypeScript

Vest ✅ Declarative validations framework

A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML

:game_die: Native language APIs for building messages using the Slack Block Kit API

Comprehensive tooling for working with OpenAPI definitions.

String validation

A Meteor package that extends Mongo.Collection to provide support for specifying a schema and then validating against that schema when inserting and updating.

⚡ Stop IAM misconfigurations before they become breaches — Catch overprivileged permissions, dangerous wildcards, and policy errors before deployment.

Validate element templates based on JSON Schema.

A tool set for CSS including fast detailed parser, walker, generator and lexer based on W3C specs and browser implementations

PHP version of Google's phone number handling library

For entering, formatting, and validating international telephone numbers. Available in vanilla JavaScript, or as React, Vue, Angular, and Svelte components.

Common input and integrity validation routines for Visual Studio and other applications

Free Australian Address Validation, Search and Autocomplete

🛠 Lightweight utilities for string & array manipulation, image handling, safe JSON encoding/decoding, validation, slug or strong password generating etc.

A type-checker and contract layer for AI agent tool calls, deny-by-default, in-process, Pydantic-only. Strict argument validation, ghost-argument stripping, and self-healing retries for MCP servers and agent frameworks.

A validation dispatcher for Claude Code hooks that enforces git workflow standards, commit message conventions, and code quality rules

A collection of Rust crates that implement all the Open Job Description specifications

Zero-dependency TypeScript implementation of Symfony's Expression Language. Safely parse and evaluate dynamic expressions in Node and the browser, with ESM/CJS/UMD builds and full typings.

DocLang spec and reference toolkit

PHP version of Google's phone number handling library

An idiomatic Go (golang) validation package. Supports configurable and extensible validation rules (validators) using normal language constructs instead of error-prone struct tags.

ESLint plugin that validates data using JSON Schema Validator.

A linter for Claude Code projects. Validates CLAUDE.md files, skills, settings, hooks, MCP servers, and plugins.

OpenAPI Spec Validator is a CLI, pre-commit hook and python package that validates OpenAPI Specs against the OpenAPI 2.0 (aka Swagger), OpenAPI 3.0 and OpenAPI 3.1 specification.

Filament plugin that allows to add dynamic, user-defined form fields, enhancing the customization and functionality of admin panels.

OpenApi schema validation for OpenApi versions v2, v3.0.x, v3.1.x and v3.2.x