XML validator and XML/JSON editor for Windows ®

Batch XML validator tasks XML validator tool
  • XML validator for W3C XSD, DTD, Schematron and RelaxNG
  • Run XML validation for multiple files quickly
  • Create detailed XML error reports also in HTML
  • Command-line XML tool and batch XML validator
XML editor and validator XML Editor
  • XML text and grid editor with syntax-coloring and well-formed checking
  • Find all errors in your XML and fix them quickly
  • Apply XSL transformations and get HTML
  • Built-in XPath Evaluator
  • XML/JSON/CSV conversions
JSON editor and validator JSON Editor
Editor and validator for large XML data XML editor for large data
  • Editor and validator for multi-GB XML input
  • Well-formed checking and syntax-coloring
  • Inspect and browse huge XML
  • Find XML data and split data with the built-in editor
  • Works with all types of text input
Schematron XML validator One-click Schematron validator
  • Leading ISO Schematron validator
  • Run XML business rules directly from the editor
  • Schematron editor with intelligent auto-completion
  • One click checking of one or multiple XML instances as batch task
Support for digital signatures Sign XML with Digital Signatures
  • Sign and verify your XML documents
  • Support for SHA-2 (SHA-256, SHA-384, SHA-512)
  • Batch signature verification and signing
  • Use key-pairs or passwords
  • Manage certificates with ease
XML ValidatorBuddy Desktop editor showing dark mode
Screenshot of Windows XML editor showing dark user-interface mode
Quick checking of multiple XML documents
Dialog with results of XML validator
XML grid editor
XML grid editor to create and edit well-formed data

XML ValidatorBuddy Desktop Application - Complete XML editor and validator

XML Validator Buddy Desktop is your easy to use set of XML tools to edit, validate, transform and manage even a large number of XML and JSON data. The grid and text editor windows offer syntax-coloring and various entry-helpers to create and modify any XML or JSON content quickly. Assign XML and JSON schemas to your data to run the built-in validator with a single click. Use the XML or JSON validator in batch mode to check any number of documents and get a comprehensive error report. XML ValidatorBuddy supports XSD, DTD and Schematron rules with the easy to use XML validator. Transform XML or JSON to HTML directly in the editor or apply XSL transformations to multiple files at once on your disk. The unique Explorer window with XML related enhancements enables everyone to work with XML and JSON technologies in a convenient and efficient way.

Complete XML editor tool screenshot
  • XML validator software for W3C, DTD, Schematron, RelaxNG and JSON Schema
  • Know instantly which XSD or DTD is assigned to your XML data.
  • Complete XML and JSON editor with grid and text editor windows.
  • Check your XML and run XSL transformations for one or multiple documents with just a few clicks.
  • Find all XML documents with no XSD or DTD reference without the need to open them manually.
  • Run any XSL transformation as custom user tool with a single click.
  • JSON/XML conversions - JSON syntax checking
  • Sign and verify XML documents with digital signatures.

XML ValidatorBuddy is also a complete JSON editor for Windows®. Edit and create JSON documents faster with the intelligent JSON auto-completion feature and find errors in your JSON data quickly with the built-in syntax checker.

Visit the Download page and install the XML ValidatorBuddy editor and validator as your XML software package right now.


XML Validator Buddy Desktop is a set of XML tools for editing, validating, transforming, and managing XML and JSON data. It offers syntax-coloring, entry-helpers, and the ability to assign schemas to data to run the built-in validator. It supports XSD, DTD, and Schematron rules, and can transform XML or JSON to HTML directly in the editor. It also includes a JSON editor with auto-completion and syntax checking. The software is compatible with Windows XP SP2, Windows Vista, Windows 7, Windows 8, and Windows 10.

Supported platforms

XML Validator Buddy Desktop: Windows XP SP2, Windows Vista, Windows 7, Windows 8, Windows 10; 64-bit Platform

Take a detailed look at some other features of XML ValidatorBuddy

XML ValidatorBuddy is more than just an XML editor. Learn more on clicking the images and links below.