Download the free JSON validator command-line tool

You are not only looking for the best JSON editor for data files and JSON schemas? You are working on a Windows system and you need to quickly validate one or multiple JSON data files from the command-line? Then you should try the free JSON validator command-line tool for Windows from

  • Check one or multiple JSON documents against a JSON schema with a single line from the Windows shell.
  • Get a comprehensive validation report with a detailed error message and full location information as JSONPointer.
  • Support for the popular JSON schema Draft 4 and the new Draft 6 (and of course, Draft 7 is coming soon).
  • Easy to use installer package. No additional configuration required.
  • Free for commercial and personal use. Just request a free license after the 14-days evaluation period.
Sample validation output in the console window.

Please note that the tool also supports XML validation against a W3C schema. To get a complete list of switches, execute valbuddy.exe from the installation folder without any parameters.

Enhanced batch validation using a configuration file for simple folder validation and log file creation requires a license for JSONBuddy or XML ValidatorBuddy.