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JSON Schema Validator

Check JSON data against the supported schema rules.

Calculations run in your browser. The tool does not send your inputs to a server.

01Your inputs

Local workspace

Start with the sample below, or enter your own values.

The sample is editable. Keep the input format consistent with the action you choose.
Use valid JSON with double-quoted keys and strings. The example shows the expected structure.

02Your result

Your result will appear here. Choose an action after checking your inputs.

A quick guide

How to use this tool

  1. Check the example and the unit beside each input.
  2. Enter your values and choose Validate.
  3. Review the result and assumptions, then copy what you need.

Reset example restores the starting values. Clear removes text and number inputs, returns choices to their first valid option, and removes the result.

Reference guide

Explanation and worked examples

Errors identify the data path and failed rule. A passing schema checks structure and declared constraints, not whether the data is factually correct.

Use in day-to-day IT work

Check a small configuration or event sample against the supported schema rules.

Checks before applying the result

  • This is a limited validator, not complete JSON Schema draft compliance. Unsupported keywords raise an error; use a full validator for production contracts.
  • Test missing fields, wrong types and unexpected properties as well as a passing example.
New to the terminology?
Endpoint
A URL and operation exposed by an API.
Idempotent
Repeating a request has the same intended effect as making it once.
Schema
Rules describing data structure and allowed values.

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