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WhySlow - WordPress Performance Plugin That Tells You Which Plugin Is Slow (Query Monitor Alternative)

by WooPlugins

The free WordPress performance plugin that pinpoints exactly which plugin is slowing your site down. Per-plugin timing attribution, N+1 query detection, autoload cleanup, transient management, full-site sitemap audit, 30-day speed score trend, side-by-side report comparison. A site-owner-friendly alternative to Query Monitor. Zero overhead when idle - only runs when you click Analyze. Works with WordPress 6.0+, PHP 7.4+.

This plugin is fully compatible with the WooCommerce Cart & Checkout blocks - a customizable, conversion-optimized checkout experience.

WhySlow. A premium WordPress plugin available here under its GPL license.

From the developer: this plugin is built by WPHaris. Read the guide on finding which plugin is slowing WordPress down.

What WhySlow does

  • Easy setup via WordPress admin
  • Full documentation and setup guide
  • Standard WordPress hook and filter API
  • Clean uninstall option

Who it is for

WordPress site owners, developers, and agencies.

Why get WhySlow here

You get WhySlow under its GPL license, with no site limit and no yearly renewal.

GPL licensing is standard for WordPress plugins and themes, and it explicitly allows redistribution. Read the full GPL explanation.

Common questions

Is this the real plugin?

Yes. It is the developer's plugin, distributed under its GPL license, which allows redistribution.

How do updates work?

Download the latest available version from your account page and upload it over the old one. Your settings stay in place.

Can I use this on client sites?

Yes. The GPL does not limit the number of sites or who owns them.

What support is included?

We help with downloads, account issues and refunds. Help with configuring the plugin comes from its documentation and community. Developer support and features that run on the developer's servers are not included.

What is the refund policy?

30-day money-back guarantee on eligible cases: a broken download, the wrong version, a duplicate purchase, or misrepresented compatibility. See our FAQ for details.

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