Cross-platform CLI tool to validate configuration files across 18 formats. Syntax and schema validation with JSON Schema, XSD, and SchemaStore integration. Written in Go.

Please visit the new repository here: https://github.com/harshanacz/xerces-wasm-validator

SplunkLint is a comprehensive, browser-based tool for validating and analyzing Splunk Dashboard XML. It provides real-time feedback, actionable recommendations, and deep SPL query analysis - all without sending your data anywhere.

XML Review Bot using https://www.npmjs.com/package/xml-language-service

Validate SEPA XML files (pain.001, pain.008) against ISO 20022 standard. Python, zero dependencies.

XML to Array is a PHP library to convert XML content into PHP arrays and supports XML validation using XSD schemas.

lightweight XML Schema validation utility

Python-based XAdES-EPES signature validator for XML documents, commonly used in electronic invoicing and digital signing workflows. This tool verifies the integrity, authenticity, and certificate information of signed XML documents, helping ensure compliance with digital signature standards.

Free JSON & XML Developer Tools — Validate, Fix & Monitor API Data