What is the JSON Formatter?
Beautify and format JSON with proper indentation. The JSON Formatter is a free online tool that works instantly in your browser — no installation, no signup and nothing to upload. It sits alongside other JSON & Data tools on DevNibble such as JSON Validator, JSON Minifier, JSON Viewer.
Formats and validates JSON entirely in your browser. Large documents are handled without ever leaving your device.
How to use the JSON Formatter
- Paste or type your data into the input panel.
- Adjust the formatting options if you need to.
- Copy or download the formatted result.
Features
- Runs 100% in your browser — your data is never uploaded or stored.
- Free forever, with no account, no ads and no tracking.
- Copy or download your result in one click.
- Fast and responsive on desktop, tablet and mobile.
Frequently asked questions
Is the JSON formatter free?
Yes, DevNibble's JSON formatter is completely free with no signup, ads or usage limits.
Is my JSON uploaded to a server?
No. Formatting happens entirely in your browser using JavaScript, so your JSON never leaves your device.
Can I format large JSON files?
Yes. Multi-megabyte files work fine; practical limits depend only on your device's memory.