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) raidboxes.de


Thanks to Mike Bostock for his great “d3js”: http://d3js.org

Thanks to Mike Bostock for his awesome “Zoomable Sunburst” implementation: http://bl.ocks.org/mbostock/4348373

Thanks to Jeffrey Sambells for his “Human Readable File Size with PHP”: http://jeffreysambells.com/2012/10/25/human-readable-filesize-php


  • Plugin in action


  1. Upload disk-usage-sunburst.zip 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

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.


November 6, 2018
My shared hosting account was signaling that my memory usage was high although I was using half of it. But I couldn't figure it out why the signal was shown. This plugin helped me identify the problem and now it is solved. Thanks to the author for such a great job! (I loved that colorful circular presentation! 😀 )
September 27, 2018
This is extraordinarily useful to have a visual overview of the files in our client sites. We are able to drill down and find the "worst offenders" and deal with them in short order, and it also helps us see which areas are tidy and small and don't need further investigation. Thank you for this plugin!
August 25, 2018
Gracias por desarrollar este excelente complemento, muy util y ahorra dinero en un VPS. Ojala lo actualicen Saludos
Read all 24 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.



  • 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, https://wordpress.org/support/topic/parse-error-syntax-error-unexpected-146)


  • Code enhanced: replaced code 10 with ‘administrator’ capability when calling add_submenu_page (thanks to doume, https://wordpress.org/support/topic/v100-deprecated-argument-in-function-call)
  • 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