API TESTING

JSON Formatter & Validator

Format, validate and minify JSON directly in your browser.

What is JSON?

JSON is a lightweight text format commonly used to exchange structured data between web applications and APIs. In API testing, readable JSON makes it easier to inspect response bodies and identify incorrect fields or values.

Common JSON testing checks

• Validate that the response is syntactically valid JSON.
• Verify required fields exist.
• Check data types and allowed values.
• Test null, empty and unexpected values.