What is JSON
JSON is a text format used to exchange data between systems and APIs, structured as key-value pairs, arrays and nested objects.
Formatted vs. minified
Formatted uses indentation for human readability; minified strips unnecessary whitespace, reducing size — used in production.
Common errors
A trailing comma, unquoted keys, single quotes, and unclosed brackets are the most common causes of invalid JSON.
Frequently asked questions
Is my data sent to any server?
No. All processing happens locally in your browser.
What's the difference between formatted and minified?
Formatted is human-readable; minified is smaller, used in production.