How to use JSON Formatter
- Type or paste your JSON into JSON Formatter's input area.
- Use the Indent setting to control the result.
- Select Format and the result updates immediately, with no upload.
- When it looks right, Copy to save it.
About this tool
There is no server behind JSON Formatter. JSON Formatter validates and reshapes your JSON locally with no server round-trip.
Because parsing is local, sensitive payloads never leave the page. Your input never leaves the page, and no account or install is required.
Frequently asked questions
What is JSON Formatter for?
JSON Formatter lets you format your input right in the browser using the Indent control, with the result shown instantly and nothing uploaded.
Do I need an account for JSON Formatter?
No — JSON Formatter needs no account, sign-up or installation.
Is my input private in JSON Formatter?
Yes — your input never leaves your device; JSON Formatter does all the work in your browser.
Can JSON Formatter handle large or deeply nested JSON?
Yes. JSON Formatter parses JSON entirely in your browser, so large or nested documents stay on your device and never upload.
Can I use JSON Formatter without a connection?
Yes — after the first load JSON Formatter runs entirely offline.