Debug Bar Plugin Activation adds a new panel to the Debug Bar which displays plugin (de-)activation and uninstall errors.
As of April 2026, Debug Bar Plugin Activation is a WordPress debugbar plugin with 10 active installations and a 5/5 rating from 2 reviews. It has been downloaded 3.6K+ times in total. Requires WordPress 3.8+ and PHP false+. Available on WordPress.org since 2016. Last updated 9 years ago — may have compatibility concerns. Top alternative: Black Bar.
Ever been “greeted” when you activated a plugin with the dreaded:
This plugin generated # characters of unexpected output during activation….
And wondered what the unexpected output was ?
Or wondered whether a de-activation or uninstall routine was free of typical PHP errors ?
Well, no need to wonder anymore, as you can now see the output within your favorite debugging tool – the Debug Bar.
Debug Bar Plugin Activation adds a new panel to the Debug Bar which displays the output generated during plugin activation, deactivation and uninstall.
Once you’ve fixed the issues, you can remove the logged output straight from the Debug Bar panel.
And when you uninstall a plugin, the associated logged activation and deactivation output entries will be removed automatic…
| WordPress | 3.8+ requiredTested up to 4.5.33 |
| PHP | false+ required |
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