JSON Formatter
Format, validate, beautify, and minify JSON instantly — free and private in your browser.
Your formatted JSON will appear here.How It Works
Paste JSON
Drop or type your raw JSON into the input box on the left — no signup or upload needed.
Choose format
Pick an indent size, then Format to beautify or Minify to compress. Validation runs instantly.
Copy or download
Copy the clean result to your clipboard, or clear everything and start again.
Frequently Asked Questions
What is a JSON formatter?+
A JSON formatter takes raw, unformatted JSON and re-indents it into a clean, readable structure. It also validates the JSON as it formats, so you instantly see whether the data is well-formed and where any errors are.
What is the difference between beautify and minify?+
Beautify (Format) pretty-prints your JSON with line breaks and indentation so it is easy for humans to read. Minify strips out all unnecessary whitespace to produce the smallest possible single-line JSON, which is ideal for storage or sending over the network.
Is my data private?+
Yes. This tool runs entirely in your browser using the built-in JSON parser. Nothing you paste is uploaded, saved, or sent to any server — your data never leaves your device, and you can even use it offline once the page has loaded.
Why is my JSON invalid?+
Common causes are trailing commas, single quotes instead of double quotes, missing quotes around keys, unclosed brackets or braces, and comments (which JSON does not allow). When your JSON is invalid, the tool shows the exact parser error message to help you pinpoint the problem.