Is Query Monitor free?

Yes, Query Monitor is free to use. It is available as a free plugin on WordPress.org.

How many websites use Query Monitor?

Query Monitor has 200K+ active installations as tracked by WordPress.org.

What are the best Query Monitor alternatives?

Popular alternatives to Query Monitor include WP Crontrol, Debug Bar, Debug Log Manager – Conveniently…. You can compare them side-by-side on our comparison pages.

Does Query Monitor work with the latest WordPress?

Query Monitor has been tested up to WordPress 6.9.4. It requires WordPress 6.1+ and PHP 7.4+.

Is Query Monitor well supported?

Query Monitor has a 43% support resolution rate based on 7 recent support threads on WordPress.org.

PluginSift

Query Monitor – The developer tools panel for WordPress

Name: Query Monitor – The developer tools panel for WordPress
Rating: 4.9 (464 reviews)
Author: John Blackbourn

Query Monitor is the developer tools panel for WordPress and WooCommerce.

By John Blackbourn·Debug·Free

4.9(464 reviews)

·200K+ active installs·Updated 2 weeks ago

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As of April 2026, Query Monitor is a WordPress debug plugin with 200K+ active installations and a 4.9/5 rating from 464 reviews. It has been downloaded 19M+ times in total. Requires WordPress 6.1+ and PHP 7.4+. Available on WordPress.org since 2013. Actively maintained — updated within the last month. Downloads are down 15% this week. Support resolution rate: 43%. Top alternative: WP Crontrol.

4.9/5464 reviews

200K+active installs

43%resolved

13 yearssince 2013

Overview

Query Monitor is the developer tools panel for WordPress and WooCommerce. It enables debugging of database queries, PHP errors, hooks and actions, block editor blocks, enqueued scripts and stylesheets, HTTP API calls, and more.

It includes some advanced features such as debugging of Ajax calls, REST API calls, user capability checks, and full support for block themes and full site editing. It includes the ability to narrow down much of its output by plugin or theme, allowing you to quickly determine poorly performing plugins, themes, or functions.

Query Monitor focuses heavily on presenting its information in a useful manner, for example by showing aggregate database queries grouped by the plugins, themes, or functions that are responsible for them. It adds an admin toolbar menu showing a…

Read full description on WordPress.org

Screenshots

Ratings & Reviews

4.9464 reviews

5 ★

449

4 ★

3 ★

2 ★

1 ★

Recent Reviews

The most useful plugin of all time

by dochara·1 week ago

If you’ve even the smell of an issue with your site, this will track it down so that you can fix it. An indispensable tool for developers.

Good

by kloddant·1 month ago·1 reply

Good. Shows a lot of useful stuff. Note that you will need to add /wp-content/db.php to your gitignore.

This topic was modified 1 month, 3 weeks ago by kloddant.

Quá tuyệt vời, plugin này web nào tôi cũng cài

by tinhnguyenblog·2 months ago

Tôi thường tạo các demo web, blog với những lựa chọn khác nhau về theme, plugin. Việc theo dõi hiệu suất backend là rất quan trọng để chọn ra được một combo tốt về hiệu suất.

Usa que é top pra quem desenvolve

by yodougxd·2 months ago

é top zé

An Amazing Tool

by dmccan·4 months ago

Sometimes you feel like your site is a black box and that is something that Query Monitor solves. It provides insight into what is happening, shows errors, and gives you stats and timings for the page load process. This helps in tracking down problems, in picking which plugins are the most performant, and when developing, to see what templates are being loaded. Amazing plugin, for free. Thank you John Blackbourn!