Developer tool

JSON Formatter

Validate, pretty-print, and minify JSON in the browser without sending payloads to a server.

How it works

How to use

Paste JSON into the input area and choose Format to indent with readable spacing, or Minify to remove whitespace for compact transport. Invalid JSON shows a parser error with the approximate location so you can fix trailing commas, unquoted keys, or mismatched brackets.

Typical workflows

  • Inspect API responses copied from browser devtools or curl
  • Compare minified config files before committing
  • Verify webhook payloads before writing PHP json_decode handlers

Limits and safety

Processing runs in your browser. Very large documents (multi-megabyte logs) may slow the tab—split files or use CLI tools like jq for bulk work. This tool does not execute JSON or load remote URLs; paste text only.

Run in browser

AJAX processing only. No remote PHP execution sandbox. Results are not indexed.

Inputs are processed for this request only and are not stored in analytics. Object unserialize and arbitrary PHP execution are blocked.

Safety notes

  • Submitted tool contents are not written to analytics or search logs.
  • This site never evaluates arbitrary PHP from the browser.
  • Generated configs are starting points—validate on a staging host before production.