Developer
JSON Schema Validator guide
Use this free JSON Schema Validator to validate JSON data against a JSON Schema locally in your browser.
JSON Schema Validator helps you validate JSON data against a JSON Schema for API contracts, config files, fixtures, generated JSON, and integration checks. It opens the matching Tiny Work Tools utility directly and runs in your browser after the page loads.
Best for
- checking whether pasted JSON matches required fields, types, arrays, and object rules in a schema
- Fast browser-based utility work without creating an account.
- Simple checks before moving data, files, or numbers into another workflow.
Not for
- full API contract testing, remote schema fetching, security audits, huge production payloads, or secret handling
- 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 validator runs in the browser and supports common JSON Schema checks. It does not fetch remote references, call APIs, store schemas, or prove business correctness.
Common uses
- Use JSON Schema Validator for API contracts, config files, fixtures, generated JSON, and integration checks.
- 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 Validator 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 Validator do?
It helps you validate JSON data against a JSON Schema 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 validator runs in the browser and supports common JSON Schema checks. It does not fetch remote references, call APIs, store schemas, or prove business correctness.