Practical guidance
Check double quotes around keys and strings. Comments and trailing commas are not part of standard JSON. For APIs, also verify required fields, value types, length limits and allowed values.
Before using this tool
Define what you need from JSON validator and prepare the relevant input. When diagnosing a live service, record the test time and connection conditions so you can compare results after configuration changes. Check findings against the documentation for your software.
Tool availability
This is currently an information page. No working form, calculations or submission to diagnostic services is available yet. The interface and supported input formats will be documented when functionality is released.