JSON Formatter & Validator
Beautify, minify, validate and inspect JSON with a rich Tree Viewer and Grid Viewer.
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How to use
Paste any JSON into the input pane. The tool automatically validates it and shows it as a collapsible Tree, a scannable Grid, a Pretty print, or a compact Minified string.
Use the Beautify and Minify buttons to normalize whitespace with 2 or 4-space indent. If your JSON is invalid, we show the exact error including line and column.
Upload a .json file, download the result, or copy it to your clipboard — nothing is uploaded to a server.
FAQ
Is my JSON data uploaded anywhere?▾
No. The entire tool runs in your browser. Files you upload are read locally and never transmitted.
What is the maximum file size?▾
For best UX we recommend under 8MB. Larger inputs can work but may slow the tree view.
Does it support JSON5 or comments?▾
It parses strict JSON. Trailing commas or comments will be flagged as invalid.
Can I share a URL to a formatted JSON?▾
For privacy we do not persist your JSON. Copy the output and share it directly.