by Gemini Labs 5 (9 reviews)

Black Bar

Name: Black Bar
Rating: 5.0 (9 reviews)
Author: Gemini Labs

Black Bar is an unobtrusive Debug Bar for WordPress developers that attaches itself to the bottom of the browser window.

Black Bar ranks #8,957 among WordPress.org plugins with 500+ active installations, is #797 of 4,928 in the Utilities & Tools category, a 5/5 rating from 9 reviews, and was last updated May 17, 2026. Data from WordPress.org, refreshed twice daily — see methodology.

Tested up to WP 7 (Current: 7.1)

v4.2.0 Current Version v4.2.0

Updated 3 months ago Last Update on 17 May, 2026

Refreshed 7 hours ago Last Refreshed on

#797 of 4,928 in Utilities & Tools Top 25% by installs Downloads -18.8% this week

View on WordPress.org

Rank

#8,957

-5 this week

Active Installs

500+

-13%

KW Avg Position

9.6

— No change

Downloads

38.8K

+1 today

Support Resolved

— No change

Rating

100%

Review 5 out of 5

5 (9 reviews)

Next Milestone 600

Total Progress 54%

500+ 600+

352

Ranks to Climb

Growth Needed

8,000,000

Active Installs

Pro

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Rank Changes

Current #8,957

Change

Best #

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Active Installs Growth

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Active Installs 0,000,000+

Growth +0.0%

Peak 0,000,000

Downloads Growth

Downloads

Growth

Peak

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Reviews & Ratings

5.0

9 reviews

Overall 100%

9 (100%)

0 (0%)

Security History

Source: WPVulnerability

No known vulnerabilities on record for Black Bar. Checked 1 month ago.

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Plugin Details

Version: 4.2.0
Last Updated: May 17, 2026
Requires WP: 6.7+
Tested Up To: 7
PHP Version: 8.1.2 or higher
Author: Gemini Labs

Support & Rating

Rating: ★ ★ ★ ★ ★ 5
Reviews: 9
Support Threads: 0
Resolved: 0%

Keywords

black bar blackbar debug bar debugbar debugging

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TL;DR

AI summary of the plugin's readme

Black Bar is for WordPress developers who need to debug and profile their code. It solves the problem of understanding what's happening under the hood during page loads by showing errors, SQL queries, slow hooks, templates, and global variables in a bottom-of-browser debug bar.

Console for debugging code
Inspect global variables
Profiler for performance measurement
View PHP errors on page load
View executed MySQL queries
View active theme template files
View 50 slowest action/filter hooks

Frequently Asked Questions

Common questions about Black Bar

To add entries to the console, insert the following line of PHP anywhere in your code: apply_filters('console', 'Enter something to debug here'); You can also add an optional log level like this: apply_filters('console', 'Enter something to debug here', 'error'); The available log levels are: debug, info, notice, warning, error, critical, alert, and emergency.

To use the profiler, insert the following lines of PHP before and after the code you are profiling: Before: apply_filters('trace:start', 'Enter a description of what you are profiling here'); After: apply_filters('trace:stop');

By default, Black Bar is only visible to administrator users. To enable it for all logged-in users, use this code snippet: add_filter('blackbar/enabled', 'is_user_logged_in');

By default, Black Bar displays the 50 slowest action/filter hooks. To display all hooks, use this code snippet: add_filter('blackbar/hooks/all', '__return_true');

By default, Black Bar marks queries that run longer than 50ms with a warning color, and longer than 1000ms with an error color. To change these thresholds, use these hooks: add_filter('blackbar/queries/ms_error', fn () => 1000); // 1s add_filter('blackbar/queries/ms_warning', fn () => 50); // 50ms