This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Disk Usage Sunburst


This plugin (Tools -> Disk Usage) shows all files of your WordPress installation at once. These are displayed in a so
called “Sunburst Chart”. Each arc of the chart is either a directory or a file. Move your mouse over an arc to see the size
of the file or directory. The bigger the arc is the bigger is the file/directory.

Very useful to determine the biggest files in your WordPress installation!

Click on an arc to zoom in, and click in the circle to zoom out again.

Questions? Drop us a mail: wp-dev (at)


Thanks to Mike Bostock for his great “d3js”:

Thanks to Mike Bostock for his awesome “Zoomable Sunburst” implementation:

Thanks to Jeffrey Sambells for his “Human Readable File Size with PHP”:


  • Plugin in action


  1. Upload to the /wp-content/plugins/ directory
  2. Activate the plugin through the ‘Plugins’ menu in WordPress
  3. See it in action under Tools -> Disk Usage!


Where is it?

After activation you find the tool under Tools -> Disk Usage

Does this plugin work on a WordPress Multisite?

Yes since 1.1 it does. Note: For privacy reasons you need to be a Superadmin to use this on a Multisite.

Loading bar doesn’t go away

In this case unfortunately this plugin can’t calculate the sizes of all your WordPress files. Check if there’s a PHP time limit in your WordPress and try to increase it.


Nîsan 16, 2024
I moved my websites over to Direct Admin (DA) panels. DA doesn’t include the option to see file diskspace breakdown like cPanel offers. No problem, because this plugin is far better! And I found some other little gremlins in the mix. I can confirm it works with WP 6.5.2 (most recent at the time of this review). Will be recommending this to my clients.
Îlon 6, 2022
I hardly write reviews anymore. Why? Because everything is pure poop and clickbait for premium “features” but every once in a while I come to download one of my must haves for a client site and I have to write something because of how dependable the plugin is and how it is literally a necessity for a site and that is why DUS is getting a 5 star. No one, has tried to do what they have done and it is such a addon to a devs toolbox. Everyone else is competing for social feed plugin users or the coolest new Elementor widgets and yet if you know anything about WP you’re here like me downloading DUS for a build. 5 stars all day, everyday!
Çile 5, 2022
what an excellent plugin, was having issue with space on server, this immediately identified a rogue plugin that was causing the problem
Read all 35 reviews

Contributors & Developers

“Disk Usage Sunburst” is open source software. The following people have contributed to this plugin.


Translate “Disk Usage Sunburst” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.



  • Fix: added missing readme.txt changes


  • Fix: removing trunk/ folder from plugin source code


  • Update: Successfully tested up to WordPress 6.1.1


  • Update: renamed RAIDBOXES to raidboxes


  • Update: Fixed wrong svn trunk commits


  • Update: Removed unused resources


  • Code-rework to make it more efficient and only load resources on it’s plugin page
  • Made the plugin multisite compatible (Thanks to @shawfactor for his idea)
  • Successfully tested up to WordPress 5.7


  • Update: Successfully tested up to WordPress 5.3


  • Update: Successfully tested up to WordPress 5.1.1


  • Update: Successfully tested up to WordPress 4.8.2


  • Update: Successfully tested up to WordPress 4.7.1


  • Advice: If you don’t see anything, increase php time limit… This plugin is maintained!


  • Bug fixed: browsers without SVG support didn’t see anything. Now these will get a nice red error message 😉


  • Bug fixed: Show error message if calculation of file/directory sizes fails (e.g. because of time limit)


  • Bug fixed: converted short array syntax to long array syntax to support PHP versions < 5.4.0 (thanks to websupporter,


  • Code enhanced: replaced code 10 with ‘administrator’ capability when calling add_submenu_page (thanks to doume,
  • User Interface enhanced: tooltip follows mouse cursor when mouse is moving
  • Bug fixed: the distance between tooltip and mouse cursor was dependent on the scroll position


  • First Version