Grégory Viguier

The plugin adds a new tab in your admin bar with simple but useful indications and tools.
<ul>
<li>Displays the number of queries in your page and the amount of time to generate the page.</li>
<li>Displays the php memory usage and php memory limits (constants <code>WP_MEMORY_LIMIT</code> and <code>WP_MAX_MEMORY_LIMIT</code>).</li>
<li>displays the php version and WP version.</li>
<li>Displays <code>WP_DEBUG</code>, <code>SCRIPT_DEBUG</code>, <code>WP_DEBUG_LOG</code>, <code>WP_DEBUG_DISPLAY</code>, and error reporting values.</li>
</ul>
In your site front-end:
<ul>
<li>Lists the template and all template parts used in the current page (template parts added with <code>get_template_part()</code>). Compatible with WooCommerce’s templates.</li>
<li><code>$wp_query</code>: this will open a lightbox displaying the content of <code>$wp_query</code>. Click the lightbox title to reload the value, click outside the lightbox to close it.</li>
</ul>
In your site administration:
<ul>
<li>Admin hooks: lists some oftenly used hooks (like <code>admin_init</code>). The indicator to the right of the line tells you how many times the hook has been triggered by a callback. A “P” means the hook has a parameter: hover it for more details. Click a hook (on its text) to auto-select its code, for example: click admin_init to select <code>add_action( 'admin_init', '' );</code>.</li>
<li><code>$current_screen</code>: displays the value of 4 properties of this object: <code>id</code>, <code>base</code>, <code>parent_base</code>, <code>parent_file</code>.</li>
<li><code>$...now</code>: displays the value of the well-known variables <code>$pagenow</code>, <code>$typenow</code>, and <code>$taxnow</code>.</li>
<li>On a user profile page, <code>$userdata</code>: : this will open a lightbox displaying the user’s data.</li>
</ul>
You can decide who’s gonna use this plugin (go to your profile page for all the settings). This way, the plugin’s items won’t show up to other users (your client for example). 
Also, a new menu item <code>Code Tester</code> will appear. There you are able to do some tests with your code.

Admin Bar Tools

I'm using this wonderfull tool in all my project and ask my studients to use it when they dev for WordPress.

Make a great job

In all my dev sites

This is one of those plugins I use on every WordPress project. The UI/UX is excellent, it's always there in the admin bar, you don't need to load anything. 

It's just a pity it's not updated to the latest WordPress versions. I sure hope this is not abandoned.

Thanks for sharing your work, @greglone.

So useful. Too bad it's not updated

Adds some small development tools to the admin bar.

Bleech

Find issues before others do – every time. With automatic screenshots, daily comparisons, and instant tests after WordPress and plugin updates. Select the pages of your choice for continuous monitoring. The plugin immediately notifies you of any visual changes it detects.
Please note: The website must be publicly accessible in order to set up and run the tests. Password protection or any kind of firewall might prevent the plugin from working correctly.
<h4>Your strategy to spot unwanted changes</h4>
How do you check your website after updates and code changes? Do you manually go through pages, or do you just cross your fingers, hoping everything will be okay? Visual regression testing provides a better way to spot issues and detect visual changes. The VRTs plugin automates testing for you with a click of a button.
<ol>
<li>Activate tests for any page or post: Upon activation, a reference screenshot is taken. This will be renewed when a post is saved or updated.</li>
<li>VRTs monitors your pages: Every day, VRTs captures and compares screenshots of your selected pages. Upgrade to Pro to automate tests for WordPress updates, integrate deployment pipelines via API, and run manual tests on demand.</li>
<li>Receive instant alerts: If a change is detected between the snapshot and the comparison screenshot, the plugin will notify you via email.</li>
<li>Review changes: The difference view makes it easy to spot changes, while the comparison slider lets you inspect the details.</li>
<li>Hide elements: Prevent false positives by excluding dynamic elements, ads, and animations from snapshots.</li>
</ol>
<h4>Use cases</h4>
In which cases can visual regression testing help you spot issues?
<ul>
<li>Plugin and core software updates</li>
<li>Manual code changes</li>
<li>External software and API issues</li>
<li>Server issues</li>
<li>Malware and other malicious code</li>
<li>Missing quality assurance</li>
</ul>
<h4>Features</h4>
<ul>
<li>No Setup: After plugin activation, the frontpage is immediately monitored and alerts are sent to the WordPress admin email.</li>
<li>Daily Tests: The plugin monitors selected posts and pages and compares screenshots daily.</li>
<li>Hide Elements: Hide dynamic or irrelevant elements to prevent false positives in your tests.</li>
<li>Click Element: Define an element that should be clicked before taking a screenshot. This is useful for closing cookie banners or modals.</li>
<li>Email Notifications: As soon as a change is detected between the snapshot and the comparison screenshot, you will be notified via email.</li>
<li>Fullscreen Review: Inspect changes up close using the difference view and comparison slider in fullscreen mode.</li>
<li>Read / Unread: Keep track of test results that require further attention by marking alerts as unread.</li>
<li>Flag False Positives: Identify acceptable changes or non-issues to minimize unnecessary notifications.</li>
<li>Update Automation (Pro): Automatically trigger tests on WordPress core, plugin, theme, or language updates and catch any issues right away.</li>
<li>Manual Testing (Pro): Run tests manually on demand, either for all configured pages or for specific pages, to verify any changes or global edits immediately.</li>
<li>API Integration (Pro): Trigger tests via PHP scripts or WP CLI for integration with other tools, deployment pipelines, or custom automations.</li>
<li>Customizable Notifications (Pro): Specify email addresses for each trigger, to set up notifications for various teams or stakeholders.</li>
</ul>
<h4>Free forever</h4>
<ul>
<li>Test up to 3 pages</li>
<li>On one domain</li>
<li>Automatic daily tests</li>
</ul>
<h4>Go Pro</h4>
Do you like VRTs and want to run more tests? 
Unlock more features with our paid plans:
<ul>
<li>Test up to 500 pages in total</li>
<li>On multiple domains</li>
<li>Scheduled daily tests</li>
<li>Multiple alert recipient groups by alert type</li>
<li>Manual tests (unlimited)</li>
<li>API access (unlimited) <a href="https://vrts.app/docs/" rel="nofollow ugc">Read the docs.</a></li>
<li>Automatic tests after WordPress updates, plugin updates and plugin installations</li>
</ul>
<a href="https://vrts.app/pricing/" rel="nofollow ugc">See pricing plans</a>
<h4>Bug reports</h4>
You found a bug? Please report it by creating an issue on the <a href="https://wordpress.org/support/plugin/visual-regression-tests/" rel="ugc">support forum</a>.
<h4>Read more</h4>
Want to learn more about VRTs? 
Visit our website: <a href="https://vrts.app/" rel="nofollow ugc">vrts.app</a>

VRTs – Visual Regression Tests

Keep your WordPress websites bug-free with automatic screenshots, daily comparisons, and instant tests after WordPress and plugin updates.

Admin Bar Tools vs VRTs – Visual Regression Tests