Loading…
Paste or upload JSON and instantly format, beautify, validate, or minify it — right in your browser.
Formatted JSON will appear here after you click Format.
APIs, logs, and config files often ship JSON as a single dense line to save bytes. That is efficient for machines but hard for people to scan. A formatter re-indents the data with consistent spacing and line breaks so structure, nesting, and mismatched brackets become obvious at a glance.
This formatter runs entirely in your browser. It parses your input with the same strict rules a JSON parser uses, then pretty-prints the result — so if it formats cleanly, your JSON is also valid. Nothing is uploaded to a server.
The same object, minified on the left and formatted with two-space indentation on the right.
{"name":"Ada","skills":["json","ts"],"active":true}{
"name": "Ada",
"skills": [
"json",
"ts"
],
"active": true
}A JSON formatter takes minified or messy JSON and re-indents it into a clean, readable structure with consistent spacing, making it easier to read, review, and debug.
Yes. JSONFormatTool.org is completely free to use, with no sign-up, account, or payment required.
No. All formatting, validation, and minification happen entirely in your browser using JavaScript. Your JSON is never sent to or stored on a server.
Yes. You can paste JSON or upload a .json file. Very large documents are handled in the browser; extremely large inputs may skip live syntax highlighting to keep the editor responsive.
Yes. After formatting you can copy the result to your clipboard or download it as a .json file directly from your browser.