JSON Formatter & Validator
Paste JSON to format it with clean indentation, minify it, or find syntax errors. Nothing is sent to a server, so it's safe for private data.
Frequently asked questions
What does formatting JSON do?
It adds line breaks and indentation so nested objects and arrays are easy to read. The data itself doesn't change.
Why is my JSON invalid?
Common causes are trailing commas, single quotes instead of double quotes, and missing quotes around keys. The error message shows where parsing stopped.