Free JSON validator command-line tool for Windows®

JSONBuddy command-line tool - valbuddy.exe

JSON Schema and XML/W3C validator tool

Download your free JSON validator command-line tool for Windows®
Easy setup. Just run the Windows® installer. No additional configuration required.
Use the JSON validator to generate detailed error reports.
XML/W3C validation is also supported (using the Apache Xerces parser).

Also available as solution for processing large JSON data:

Easy to use JSON validator to check one or multiple JSON data files.

Usage example:

valbuddy.exe -v -verbose -s "D:\Examples\Library\library_schema.json" "D:\Examples\Library\library.json" "D:\Examples\Library\library_invalid.json"

Call "valbuddy.exe" without any paramters to get a list of options in the console window.

Validation output:

D:\Examples\Library\library.json: valid

D:\Examples\Library\library_invalid.json: invalid
Did not find the following required properties: [title]
Input location: /bib/book/2
Schema location: /properties/bib/properties/book/items

Finished processing

Also available as: JSONBuddy Web API for data validation

If you prefer a web-based solution, you can use the JSONBuddy Web API for validating JSON data. This API is designed for developers who need to validate JSON documents programmatically without installing any software. It offers two endpoints:

Simple validation for quick checks with plain JSON strings.
Advanced validation supporting structured input.

The service is fast, secure, and requires an API key for authenticated use.

Take a detailed look at some other features of JSONBuddy

JSONBuddy is more than just a JSON editor for Windows ®. Learn more on clicking the images and links below.

JSON validation debugger

See in detail how your JSON data is validated using the JSON Schema validation debugger.

Try here

Convert JSON to CSV

XML, JSON, CSV and HTML conversion tool. Import CSV text and get JSON, XML or HTML.

Prettify JSON of any size

Use the streaming JSON formatter to get pretty JSON.

JSON Schema Testing Tool

Verify how a set of data files align with your JSON Schema resources. Easy and automated.

JSON Schema editor

Get a complete JSON Schema designer with extended support for creating and testing JSON schema specifications.

Import CSV text

Import from any CSV text and get structured JSON or XML data in the editor.

JSON Pointer

JSON editor with built-in JSON pointer engine. Useful on creating JSON Schema documents and for navigation.

JSON Schema Analyzer

The only JSON editor with a built-in JSON Schema analyzer.