#validation

A flexible forms validation and rendering library for Python.

Generate and validate ISO 20022 payment files (pain.001 v03-v12, pain.008) from CSV, SQLite, JSON, or Parquet. XSD and SEPA scheme validation, pain.002 and camt.053 parsers and builders, plus a CLI, REST API, MCP server, and LSP server for editor diagnostics. 🐍

The Open Standard for Generative UI

TypeScript-first schema validation with static type inference

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

📋 Validation resolvers: Yup, Zod, Superstruct, Joi, Vest, Class Validator, io-ts, Nope, computed-types, typanion, Ajv, TypeBox, ArkType, Valibot, effect-ts, VineJS and Standard Schema

Super-fast/easy runtime validators and serializers via transformation

A light-weight, flexible, and expressive statistical data testing library

✅ Headless form validation library for Vue.js

Full-stack CRUD, simplified, with SSOT TypeScript entities

String validation

The missing linter and lsp for AI coding assistants. Validate CLAUDE.md, AGENTS.md, SKILL.md, hooks, MCP. Plugin for all major IDEs included, with autofixes.

💻 a library for parsing and manipulating IPv4 and IPv6 addresses in JavaScript

AI-safe .env files: Schemas for agents, Secrets for humans.

⚖️ Probatio. A modern, maintained data validation library for Python. Clean-room, MIT-licensed, drop-in reimplementation of voluptuous.

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

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

Comprehensive tooling for working with OpenAPI definitions.

Opinionated framework for Django - batteries included

Validate element templates based on JSON Schema.

Type-safe combinatorial CLI parser for TypeScript

🦊 Anti-detect browser

PHP version of Google's phone number handling library

PHP version of Google's phone number handling library

The most powerful data validation library for JS

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

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

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

The form framework for coding agents

Free Australian Address Validation, Search and Autocomplete