JSON Formatter
Pretty print, minify, validate, and copy JSON in your browser
Overview
JSON Formatter is a free online tool that helps you pretty print (format), minify, and validate JSON. Everything runs locally in your browser, so your data stays private.
How to Use
Paste JSON
Paste your JSON into the input area.
Choose an action
Use Format, Minify, or Validate. Optionally set indent and key sorting.
Copy the result
Copy the output JSON with one click.
A practical example
Inspect a compact API response while debugging. Format sample JSON to read its structure, fix syntax errors and copy the result back into your test.
Features
Pretty print & minify
Switch between readable JSON and compact JSON instantly.
Validation
Quickly detect JSON syntax errors.
Optional key sorting
Normalize object key order for consistent formatting.
FAQ
Is my JSON sent to a server?
No. Processing happens entirely in your browser.
Does it support JSON Lines or JSON5?
Not in the MVP. Only standard JSON is supported.