Query Monitor is the developer tools panel for WordPress.

This plugin makes testing Yoast SEO, Yoast SEO add-ons and integrations and resetting the different features a lot easier.

What The File is the best tool to find out what template parts are used to display the page you're currently viewing!

Updates the assets version of all CSS and JS files. Shows the latest changes on the site without asking the client to clear browser cache.

Stop all outgoing emails sent from WordPress.

Your custom SASS, CSS, JS, PHP and HTML customizations in same directory.

Want to lock your site for Maintenance or Development? Then this is the right Plugin

Making sense of the rewrite mess. Display and play with your rewrite rules.

Displays WordPress 5.5's new environment type setting in the admin bar and the 'at a glance' dashboard widget.

An implementation of PHP Console as a WordPress plugin. Use Chrome Dev Tools to debug your WordPress installation!

Adds the current page's template name to the admin bar.

A plugin, which helps WordPress developers develop.

Extends the debug-bar plugin with additional tabs to measure runtimes between checkpoints and lookup variable content.

Add and remove example post content to assist you in designing and developing new and current themes.

Adds some small development tools to the admin bar.

See clearly and understand how WordPress rewrite rules work within a simple and clean interface

Easily debug WordPress sites using Ray.

Updates the assets version of all CSS and JS files. Shows the latest changes on the site without asking the client to clear browser cache.

A tool for experienced frontend performance engineers to take control over the scripts and styles enqueued on their site.

Provides support for the PHP session allowing data to be retained from one request to another.