JSON Formatter & Beautifier.
Pretty-print and indent messy JSON in one click. Pick 2 spaces, 4 spaces, or tabs — the formatter validates as it beautifies, all in your browser.
No signup · No uploads · Free forever
Output
// Paste JSON and press “Format JSON”.Format and beautify JSON online — free and private
A JSON formatter turns minified, escaped, or hand-edited JSON into clean, indented, human-readable text. Paste your JSON above, choose how deep you want the indentation, and press Format JSON to instantly beautify it. Because the whole thing runs client-side, you can pretty-print JSON online without ever sending sensitive data to a server.
How to format JSON in three steps
- Paste your JSON into the input, or click “Load sample” to try it.
- Choose an indent — 2 spaces, 4 spaces, or tabs.
- Format and export — copy the beautified JSON or download it as
data.json.
Why use this JSON beautifier?
Unlike many online formatters that quietly upload your payload, this tool processes everything locally. It validates before it formats, so invalid JSON is caught with the exact line and column of the error instead of producing broken output. Need the opposite? Use the JSON minifier to compress, the JSON validator to check syntax, or the JSON viewer to explore structure as a tree.
FAQ
JSON formatting, answered.
How do I format JSON online? +
Paste your JSON into the formatter above, choose an indent size (2 spaces, 4 spaces, or tabs), and press Format JSON. The tool reindents and pretty-prints the JSON instantly in your browser, then lets you copy or download the result. Nothing is uploaded to a server.
What is the difference between formatting and minifying JSON? +
Formatting (also called beautifying or pretty-printing) adds line breaks and indentation so JSON is easy to read. Minifying removes all unnecessary whitespace to make the JSON as small as possible. Use the formatter for reading and editing, and the minifier for production payloads.
Does the JSON formatter validate my JSON? +
Yes. The formatter parses your input before reformatting it, so invalid JSON is rejected with the exact line and column of the syntax error. If it formats successfully, your JSON is valid.
Is my data safe? +
Completely. The formatter runs entirely in your browser using client-side JavaScript. Your JSON is never sent to, stored on, or seen by any server — making it safe for API keys, configuration, and private data.
Can I format large JSON files? +
Yes. Because processing is local, the only limit is your device's memory. Multi-megabyte JSON documents typically format in milliseconds.