Developer
JSON Schema Checker guide
Use this free JSON Schema Checker to check JSON against a JSON Schema in the browser locally in your browser.
JSON Schema Checker helps you check JSON against a JSON Schema in the browser for developers, QA notes, API debugging, config validation, and AI-generated JSON review. It opens the matching Tiny Work Tools utility directly and runs in your browser after the page loads.
Best for
- finding schema validation errors such as missing required fields, wrong types, and unexpected properties
- Fast browser-based utility work without creating an account.
- Simple checks before moving data, files, or numbers into another workflow.
Not for
- remote $ref resolution, server-side validation, compliance evidence, large contract test suites, or production secrets
- Regulated, certified, or production-critical decisions that require a specialist tool.
How it works
- Open the tool page and use the preselected utility.
- Enter the text, numbers, or file requested by the tool.
- Review the result and download or copy it when the output looks right.
Limits and privacy
The checker validates pasted JSON against a pasted schema locally. It reports schema paths and data paths, but does not generate schemas or repair invalid data.
Common uses
- Use JSON Schema Checker for developers, QA notes, API debugging, config validation, and AI-generated JSON review.
- Prepare a quick result before uploading, sharing, reporting, or pasting elsewhere.
- Keep small everyday utility tasks in the browser without installing desktop software.
Useful facts
- Tiny Work Tools JSON Schema Checker runs locally in the browser after the page loads.
- The page is free to use and does not require an account.
FAQ
What does JSON Schema Checker do?
It helps you check JSON against a JSON Schema in the browser using the matching Tiny Work Tools browser utility.
Does it upload my input?
The tool is designed to run locally in your browser after the page loads.
What should I check before using the result?
The checker validates pasted JSON against a pasted schema locally. It reports schema paths and data paths, but does not generate schemas or repair invalid data.