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:100:Go Struct and Field validation, including Cross Field, Cross Struct, Map, Slice and Array diving

HTML Validator, Formatter, LSP, and Templating Language Library

String validation

Provides tools to validate values

An express.js middleware for validator.js.

HIPAA X12 document parser, validator and converter

Lightweight javascript validator supporting Language Independent Validation Rules Specification (LIVR)

A schema and validator for YAML.

Open Source Java e-Invoicing library, validator and tool (Factur-X/ZUGFeRD, UNCEFACT/CII XRechnung)

Validate credit cards as users type.

Tool to validate glTF assets.

Fast JSON schema validator for Python.

XML Schema validator and data conversion library for Python

CSV validator, highlighter and formatter plugin for JetBrains Intellij IDEA, PyCharm, WebStorm, ...

A form input builder and validator for React JS

Yii validator library

Canonical GTFS Validator project for schedule (static) files.

API spec validator and OpenAPI document generator for Python web frameworks.

Public API management tool

A high-performance JSON Schema validator for Rust

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

Prisma generator that emits TypeScript classes decorated for @nestjs/swagger, class-validator, and TypeGraphQL — DTO/entity classes generated straight from schema.prisma.

NationalCode - CodeMelli Generator & Validator

libopenapi is a fully featured, high performance OpenAPI 3.2, 3.1, 3.0, Overlays and Arazzo parser, library, validator and toolkit for go applications.

The Compliance Validator

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

a Solana validator client implementation written in Zig

The BMad Builder and Validator

JSON Schema validator that compiles to plain JavaScript, still runs where code generation is blocked, and can be compiled away at build time. Passes the full official test suite. https://socket.dev/npm/package/ata-validator

Teach your AI to draw correct, beautiful draw.io diagrams — declarative layout engine, ground-truth stencils, structural validator, vision self-check. AWS · Azure · GCP · Databricks · BPMN. Zero dependencies.