Learn how to find common JSON syntax errors and safely format data before using an API.

JSON is strict

Keys and string values use double quotes, trailing commas are invalid, and braces and brackets must be balanced.

Validate before sending API requests

A validator catches syntax mistakes early and a formatter makes nested objects easier to inspect.

Do not paste secrets into public tools

Remove API keys, credentials, personal information and other sensitive values before sharing JSON with any third-party service.