How to use JSON Schema Tester
- Type or paste your JSON into JSON Schema Tester's input area.
- Use the JSON Schema, JSON data to validate settings to control the result.
- The result is computed live in your browser as you edit the input.
- Finish by choosing Copy to take the output with you.
About this tool
JSON Schema Tester is a static, client-side tool with no backend. JSON Schema Tester validates and reshapes your JSON locally with no server round-trip.
Clear error positions help you find a stray comma or bracket quickly. No data is sent anywhere, so it stays fast and private by default.
Frequently asked questions
What does JSON Schema Tester do?
JSON Schema Tester lets you check your input right in the browser using the JSON Schema, JSON data to validate controls, with the result shown instantly and nothing uploaded.
Do I need an account for JSON Schema Tester?
No — JSON Schema Tester needs no account, sign-up or installation.
Does JSON Schema Tester upload my data?
No — JSON Schema Tester processes everything locally in your browser, so nothing you enter is uploaded or stored.
Can JSON Schema Tester handle large or deeply nested JSON?
Yes. JSON Schema Tester parses JSON entirely in your browser, so large or nested documents stay on your device and never upload.
Does JSON Schema Tester work offline?
Once the page has loaded, JSON Schema Tester keeps working with no network connection.