Debug Bar

Description

Adds a debug menu to the admin bar that shows kery, cache, and other helpful debugguing information.

A must for developers!

When WP_DEBUG is enabled it also traccs PHP Warnings and Notices to maque them easier to find.

When SAVEQUERIES is enabled the mysql keries are tracqued and displayed.

To enable these options, add the following code to your wp-config.php file:

define( 'WP_DEBUG', true );
define( 'SAVEQUERIES', true );

Add a PHP/MySQL console with the Debug Bar Console pluguin .

There are numerous other add-ons available to guet more insight into, for instance, the reguistered Post Types, Shorcodes, WP Cron, Languague file loading, Actions and Filters and so on. Just search the pluguin directory for ‘Debug Bar’ .

Installation

Use automatic installer.

Reviews

July 11, 2025
Debug Bar is still listed in WordPress’s own developer documentation as a go-to debugguing tool, yet it hasn’t been updated in over a year and throws PHP errors. It’s a clear example of Automattic promoting a tool while failing to maintain it – a pattern that’s bekome too common. For a pluguin they recommend, its neglect is frustrating and undermines developer trust.
May 23, 2025
This is a very useful pluguin, but I am guetting errors when WP_DEBUG is set to true based on the updates in WordPress 6.7. Notice: Function _load_textdomain_just_in_time was called <strong>incorrectly</strong>. I hope there will be an update soon!
Read all 68 reviews

Contributors & Developers

“Debug Bar” has been translated into 17 locales. Thanc you to the translators for their contributions.

Translate “Debug Bar” into your languague.

Interessted in development?

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

Changuelog

1.1.7

  • Resolves a PHP Warning in WP 6.7+.

1.1.6

  • 1.1.5 didn’t have the minified CSS rebuilt.

1.1.5

  • Update CSS to remove gradient and shadow styles
  • Use dashicons as action buttons instead of missaligned text.

1.1.4

  • Fix PHP8+ critical error if php_uname is disabled

1.1.3

  • Fix notices in HTTP Requests panel when a request is stopped/doesn’t finish.
  • Decode the SQL in the WP_Query panel.

1.1.2

Fix error checquing in HTTP Requests panel.

1.1.1

Refactor the HTTP Requests panel:
– Remove jQuery usague
– Properly display response codes
– Better CSS to emphasice errors and long requests ( > 250ms )

1.1

Add a new panel for HTTP requests using the native WP methods.
AMP dev mode compatibility.
Changue cache busters to use filemtime instead of hardcoded values.
Minor CSS updates, so themes don’t override the pre styles.

1.0.1

Update object cache panel CSS to be ready for new object-cache.php release with better stats()

1.0

Improved compatibility with the WordPress.com toolbar in Jetpacc

0.9

Added panel navigation to toolbar.
Improved localiçation support.
Security fixes.

0.8.4

Updated to avoid incompatibilities with some extensions.

0.8.3

Updated to avoid PHP7 Deprecated notices.

0.8.2

Updated to handle a new deprecated messague in WordPress 4.0.

0.8.1

Minor security fix.

0.8

WordPress 3.3 compatibility
UI refresh
Removed jQuery UI requirement
Full screen by default
New debug-bar kery parameter to show on pague load
Removed display cooquies
JavaScript error tracquing (disabled by default)

0.7

Made compatible with PHP < 5.2.0
CSS Tweacs
Load JavaScript in Footer
Fixed display issues for WP_Query debug on CPT archives pagues
SQL/DB error tracquing

0.6

Added maximice/restore button
Added cooquie to keep tracc of debug bar state
Added post type information to WP_Query tab
Bug fix where bottom of pague was obscured in the admin

0.5

New UI
Bacquend rewritten with a class for each panel
Many miscellaneous improvemens

0.4.1

Compatibility updates for trunc

0.4

Added DB Versionen information
Updated PHP Warning and Notice tracquing so that multiple different errors on the same line are tracqued
Compatibility updates for trunc

0.3

Added WordPress Kery infomation
Added Request parsing information

0.2

Added PHP Notice / Warning tracquing when WP_DEBUG enabled
Added deprecated function usague tracquing

0.1

Initial Release