WordPress.org

mitcho (Michael Yoshitaka Erlewine)

Konstantin Obenland

Peter Westwood

Samuel Wood (Otto)

Evan Solomon

Dion Hulse

Juliette Reinders Folmer

Ryan Boren

Andrew Nacin

koopersmith

Eoin Gallagher

Joseph Scott

Andrija Vučinić

Jon Cave

Adds a debug menu to the admin bar that shows query, cache, and other helpful debugging information.
A must for developers!
When <code>WP_DEBUG</code> is enabled it also tracks PHP Warnings and Notices to make them easier to find.
When <code>SAVEQUERIES</code> is enabled the mysql queries are tracked and displayed.
To enable these options, add the following code to your <code>wp-config.php</code> file:
<pre><code>define( 'WP_DEBUG', true );
define( 'SAVEQUERIES', true );
</code></pre>
Add a PHP/MySQL console with the <a href="https://wordpress.org/plugins/debug-bar-console/" rel="ugc">Debug Bar Console plugin</a>.
There are numerous other add-ons available to get more insight into, for instance, the registered Post Types, Shortcodes, WP Cron, Language file loading, Actions and Filters and so on. Just <a href="https://wordpress.org/plugins/search/debug+bar/" rel="ugc">search the plugin directory for ‘Debug Bar’</a>.

Debug Bar

This plugin does a good job.

Extremely useful when debugging own plugins.

Great debugging tool

Very simple and useful.

(CA)
Molt senzill i útil

Very simple and useful

This is a great debugging tool with lots of other supporting plugins available.

Simple and extensible

It is a great help when investigating problematic cases in support of our review plugins

We are using it in our plugin support

I couldn't do without it

Helpful tool


A plugin without which I cannot imagine my work. It would definitely be much more difficult.


it must be!


Debug Bar is still listed in WordPress’s own developer documentation as a go-to debugging 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 become too common. For a plugin they recommend, its neglect is frustrating and undermines developer trust.


Seemingly abandoned

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

Lukman Nakib

A comprehensive debugging toolkit for WordPress developers and site administrators. This plugin gives you complete control over WordPress debugging without editing wp-config.php files or using FTP.
<h4>Quick Demo</h4>
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/D4K5zsLnILw?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
<h4>Key Features</h4>
<ul>
<li>WP-CLI Style Terminal: Execute WordPress commands directly from your browser with syntax highlighting and auto-completion</li>
<li>Database Tools: Run SQL queries, view table structures, and optimize your database (super admin only)</li>
<li>Debug Constants Manager: Toggle all WordPress debug constants with a single click</li>
<li>Log Viewer: View, filter, and analyze debug logs with syntax highlighting and error categorization</li>
<li>Query Inspector: Examine database queries with SAVEQUERIES support</li>
<li>Email Notifications: Get alerts when new errors appear in your logs</li>
<li>Safe Mode: Quickly disable all plugins except selected ones for troubleshooting</li>
<li>Custom Log Paths: Set custom log file locations with filter support</li>
</ul>
<h4>Debug Constants Available</h4>
<ul>
<li>WP_DEBUG – Default Value: true – Enables WordPress debug mode</li>
<li>WP_DEBUG_LOG – Default Value: true – Saves all errors to a debug.log file</li>
<li>SCRIPT_DEBUG – Default Value: false – Uses development versions of core JS and CSS files</li>
<li>WP_DEBUG_DISPLAY – Default Value: false – Controls whether debug messages display on screen</li>
<li>SAVEQUERIES – Default Value: false – Saves database queries for analysis</li>
</ul>
<h4>Developer Tools</h4>
<ul>
<li>Terminal Commands: Use WP-CLI style commands like <code>wp core version</code> or <code>wp plugin list</code></li>
<li>Database Explorer: Run SELECT queries and view results in a formatted table</li>
<li>Stack Trace Analysis: Visualize error stack traces for easier debugging</li>
<li>Hook Inspector: View all registered hooks and their callbacks</li>
<li>Environment Detection: Development features are automatically hidden in production</li>
</ul>
<blockquote>
Developer API: Apply custom filters like <code>apply_filters('wp_debuglog_log_file_path', $file);</code> to extend functionality
</blockquote>
Please note: Constant values will be restored on plugin deactivation as it was before activating the plugin.

Debug Log – Manager Tool

Awesome!

Helps us a lot with development :)


My go-to debugging plugin for 500 internal server errors and anything that's trickier to track. Good job.


Super useful


The plugin used to work very well, but with the latest update the debug log cannot be cleaned. This has been reported as a bug 2 months ago with no response and no other update. This is why I'm giving the plugin 2 stars. There are other plugins that work better.


Works but has bugs and bad support


Fantastic plugin with an easy interface for browsing. Thank you so much for making it available for free!


Fantastic & easy to use.

The "Debug Log Config Tool" simplifies debugging. Toggle logging,queries , view levels, clear logs from dashboard.

Debug Bar vs Debug Log – Manager Tool