JSON Formatter
Format & validate JSON
π 100% client-side β your data never leaves this pageAbout this tool
Paste any JSON string and instantly get a clean, indented, readable version. Supports 2-space, 4-space and tab indentation. Errors are highlighted clearly so you can fix malformed JSON quickly.
Frequently Asked Questions
What is a JSON formatter?
A JSON formatter (also called a JSON beautifier) takes minified or unformatted JSON and adds proper indentation and line breaks to make it human-readable.
Is my JSON data safe?
Yes. This tool runs entirely in your browser. Your JSON data is never sent to any server.
Why is my JSON invalid?
Common causes include trailing commas, single quotes instead of double quotes, unquoted keys, or missing brackets. The error message will point to the exact location.
What is the difference between JSON and JavaScript objects?
JSON requires double-quoted keys and does not support functions, undefined, or comments. JavaScript objects are more flexible.