What is JSON Formatter?
JSON Formatter is a tool that beautifies, minifies, and validates JSON documents. Use it when you need to read API responses, lint a config file, or compress JSON before shipping it.
How to use
- Paste your JSON into the input area on the left.
- Pick Beautify or Minify; indentation is configurable.
- Copy the output, or fix errors highlighted in red.
Frequently asked questions
Is this JSON formatter safe to use with sensitive data?
Yes. All parsing and formatting happens entirely in your browser. Nothing is uploaded to a server.
Does it support JSON5 or comments?
No. The formatter follows the strict JSON specification (RFC 8259). Comments and trailing commas are reported as errors.
What is the largest JSON I can format?
There is no hard limit, but browsers slow down above ~10MB. For huge files prefer a CLI like jq.
Can I copy the formatted result?
Yes — every output panel has a one-click Copy button.