JSON Formatter
Beautify, minify, and validate your JSON data instantly, entirely in your browser.
JSON Formatter tool
100% Privacy
Files stay strictly on your device. Zero server uploads.
Instant Speed
Local browser WebAssembly & JS processing engine.
Free Forever
Unlimited usage with no hidden fees or watermarks.
How to Format JSON
Input JSON
Paste JSON data or upload a JSON file.
Format
Click Beautify to format or Minify to compress.
Validate
Invalid JSON shows the parser's error message.
Copy or Download
Copy the formatted JSON or download as a file.
Start using JSON Formatter now – it’s completely free and works instantly in your browser.
Frequently Asked Questions
Does it show a tree view or syntax highlighting?
Not currently — output is shown as plain formatted text without syntax highlighting or a collapsible tree view.
What JSON formats are supported?
Standard JSON as defined by RFC 8259.
Does it show error locations?
Invalid JSON shows your browser's own parser error message, which typically indicates the problem's position.
Can I upload a JSON file?
Yes, you can upload .json files directly.
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