JSON Formatter
Free online json formatter. Prettify or minify JSON. Fast, secure, and 100% client-side. No registration required.
Runs in your browser. No account required.
How to use JSON Formatter
Validate, pretty-print or minify JSON. Invalid JSON is reported with the parser error so you can find the problem.
- Paste your JSON into the input box.
- Choose 2 spaces, 4 spaces or no indent.
- Select Format or Minify, then copy the result.
Questions
- Does it validate JSON?
- Yes. The input is parsed before formatting, and a parse error is shown instead of output when the JSON is invalid.
- Why does my JSON fail to parse?
- Common causes are trailing commas, single quotes instead of double quotes, unquoted keys and comments. Strict JSON allows none of these.
- What does minify do?
- It removes all whitespace between tokens, which makes the JSON smaller for APIs, config values or storage.
- Is my data uploaded to a server?
- No. The conversion runs in your browser with JavaScript, so your files and text stay on your device.
Related tools
- CSV to JSON: Convert CSV files to JSON.
- JSON to CSV: Convert JSON to CSV.
- Diff Checker: Compare two text snippets.
- Byte Converter: Bytes, KB, MB, GB, TB, PB.