JSON formatter and validator
Format, validate and minify JSON. Errors point to the exact line, and a tree view helps you explore.
Paste JSON to start. Errors show the line and column.
- 1Paste JSON or open a file.
- 2Pick an indent, or minify it. Errors show the line and column.
- 3Copy or download the result.
- Does my data leave my device?
- No. Everything you paste or open is processed in your browser and stays on your device.
- Does it work offline?
- Yes. Once this page has loaded, it keeps working without an internet connection.
- Is there a size limit?
- No limits from us. Very large inputs can be slow because the work uses your device's memory.
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