How to Format and Validate JSON (and Fix the Most Common Errors)
Turn a wall of minified JSON into something readable, check it is valid, and fix the errors that break most JSON: trailing commas, single quotes, unquoted keys and…
Read the guide →Guides and tutorials
Practical how-to guides for writers, creators and developers, with step-by-step screenshots of our free tools.
How to Prototype Mobile App Screens with a Fake API (iOS, Android and Web)
Don't wait for the backend. Learn how to get a free API key, request realistic sample data in simple, medium or complex JSON, and plug it into Swift,…
Read the guide →