XML/JSON editor and workflow tool for Windows®

XML ValidatorBuddy is your set of workflow tools to edit, validate, transform and manage even a large number of XML and JSON documents. The unique File Explorer with XML related enhancements enables everyone to work with XML and JSON technologies in a convenient and efficient way.

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Manage XML documents Manage your XML documents with ease

Get these benefits with XML ValidatorBuddy

  • Easy to use XML batch validation
  • XML Editor
  • Open and validate huge files
  • Sign XML with Digital Signatures
  • Schematron Editor & validation
  • JSON Editor
  • Convert CSV to JSON or XML
  • JSON well-formed checking
  • JSON auto-completion & syntax-coloring
  • JSON Schema validation


  • XML ValidatorBuddy Desktop

    XML/JSON editor and workflow tool.


  • XMLSpy® plugin

    Easy Schematron validation and enhanced W3C validation. Get all validation errors at once.


  • Command-line tool

    Easy to use XML validation from the command-line.



XML ValidatorBuddy v4.6

Release date: September 25th 2013

New Features:

  • Conversions between XML and JSON formats
  • Single-click Well-formed checking of folders
  • Sign multiple XML files with Digital Signatures at once
  • Import CSV files as XML or JSON
  • JSON Editor with auto-completion and syntax-coloring
JSON auto completion


I like the integration on one screen of the XML instance, the Schematron file with the easy 'Validate' button and the validation output pane. XML ValidatorBuddy makes Schematron development easier and faster.

J. Tschumperlin, New Zealand

Perfect to validate my huge (above 3GB) XML files!

Piotr Danowski, Poland

XML ValidatorBuddy 4.8
XML/JSON editor and workflow tool for Windows®

Free download.
14 days trial period.


Use XML ValidatorBuddy for your XML and JSON related tasks:

  • Easy to use desktop application. The XML and JSON editor for everyone!
  • Validate one or multiple XML files and get detailed error reports.
  • Validate even large (multi-GB) XML instance files.
  • Open your huge XML files with the Large File Viewer window.
  • Easy Schematron and RelaxNG validation.
  • JSON syntax coloring and well-formed checking.
  • JSON Schema validation.
  • XML validation against any schema file also for XML documents with no schema already assigned.
  • Generate clear and comprehensive Schema documentations for your W3C Schema files.
  • Apply any XSL transformation.
XML ValidatorBuddy 3.7 XMLSpy® Plugin
The only Schematron validator for XMLSpy®

32-bit version - Free download.
14 days trial period.

  • Adds Schematron validation to XMLSpy®.
  • Jump-to-error functionality for Schematron results.
  • Available as 32-bit and 64-bit plugin.

64-bit version - Free download.
14 days trial period.

JSONBuddy 2.5
JSON editor for Windows®

Free download.
14 days trial period.


Create and edit JSON with ease:

  • Validate your JSON input and get detailed error reports.
  • Pretty-print and remove whitespace functionalities
  • JSON syntax coloring and well-formed checking.
  • Editor with intelligent auto-completion for all JSON documents.
  • Support for JSON Schema validation.
  • JSON Pointer Evaluator
  • JSON/XML conversions
  • Open your huge text and JSON files with the Large File Viewer window.
  • Convert CSV files to JSON or XML
  • Convert JSON documents to CSV with ease
XML ValidatorBuddy 3.2 Command Line Tool
Free XML validation tool
  • Command line tool for XML validation and well-formed checking.
  • Uses the popular Apache Xerces parser.
  • Support for batch validation.
  • Free to use. Just request a free license key after the trial period.
  • Please note: The free license doesn't support enhanced batch validation.