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

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


  • XML ValidatorBuddy Desktop

    XML/JSON editor and workflow tool.


  • XMLSpy® plugin

    Easy Schematron support for your business rules. Get all validation errors at once.


  • Command-line tool

    Easy to use XML validator from the command-line.



XML ValidatorBuddy 5

Release date: September 19th 2014

New Features:

  • Schematron SVRL output with XPath support
  • Well-formed checking batch tasks
  • Quick association pane for quick access to Schematron and JSON schema files
  • JSON Schema editor and validator
  • JSON Schema specific auto-completion and syntax-coloring
JSON auto completion


I like the integration on one screen of the XML instance, the rule 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


Please help us to make our tools better.
We will take your feedback to improve the usability and features of our products.

Thank you very much for participating!

1.) How did you learn about our tools?

Search engine

2.) Why did you choose one of our tools?

Reasonable price
Good usability
The tool offers unique functionalities

3.) How often do you use the software?

Once a week
A couple of times every month
Not frequently, only if I need to work with XML files

4.) How often do you use the following functionalities?

• XML/JSON editing
• XML/JSON validator
• XML validation against XSD/DTD
• Batch validation
• Large XML file validator (>100 MB)
• Well-formed checking of XML/JSON files
• Sign and verify XML documents
• XSL transformation
• Generation of schema documentation
• Schematron rules
• Find invalid XML
• Generate XML from directory
• External tools functionality
• Subfolder search on File Explorer tab (desktop application)
• XMLSpy® plugin
• Command line tool

5.) How well-arranged and easy to use are these functionalities?

Excellent Poor

6.) Which of the functionalities below would you like to have in XML Validator Buddy?

• Change encoding of one or multiple files at once
• Enhanced batch functionalities
 (create and manage scheduled tasks, view results in application)
• Automatically apply XSL transformations and preview results
• Automatically validate XML/JSON files in the background

7.) Please rate the overall quality (usability, feature set, stability) of the software.

High Low

8.) Would you recommend the tool to a client or colleague?

Yes No

9.) Did you encounter any unexpected behavior on using the software?

The tool stopped working
Low performance
Missing or no documentation/unclear functionality
Other behavior or please explain further what you checked above

10.) Is there anything else you want to tell us to improve our tools?