Makes JSON/JSONP easy to read.
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JSON Formatter

Chrome extension for pretty-printing JSON and JSONP when you visit it 'directly'.


  • JSONP support
  • Fast, even on long pages
  • Works on any valid JSON page – URL doesn't matter
  • Syntax highlighting
  • Collapsible trees, with indent guides
  • Clickable URLs
  • Buttons for switching between raw and parsed JSON

A background worker is used to prevent the UI freezing when processing very long JSON pages.


Go here and install it:

Or install from source:

  • open Chrome and go to chrome://chrome/extensions/,
  • enable "Developer mode",
  • click "Load unpacked extension",
  • select the extension subdirectory of this repo.

Some URLs to try it on: