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 me a mail: marcel (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!


Installation Instructions
  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.


Helped me out

Helped me to identify large files that i needed to get rid of before moving my site to another server. Thanks!

A brilliant way to winkle out huge hidden files

Was trying to back up our site, but the backup kept failing because there wasn’t enough disk space, even though it’s not a huge site. Using this nifty plugin I was able to find 10GB(!!) of backup files we didn’t need, and that the backup plugin was trying to back up. It’ll tell you where they are (hover over the central circle to work out the disk path) and then you can FTP in and delete them. Nice!

Very neat plugin

I identified a disabled plugin that had left 500Mb of data lurking! Thank you, this is very nifty and the display is innovative too.

Does not Work with WP4.5.2

this plugin hasn’t been updated for a year. I tried it with WP 4.5.2 and just locked up. Had to delete plugin via FTP.

Sad , it would be good great if it worked !

Read all 18 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 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