Easy Responsive Test

Easy Responsive Test

5/5 (3 ratings) 10 active installs Updated Jun 9, 2026
Easy Responsive Test settings page

Easy Responsive Test settings page

Easy Responsive Test (ERT) is an essential tool for WordPress administrators and developers who need to verify how a site looks at different screen dimensions. After activation, the plugin creates a dedicated preview page that loads your site inside a resizable iframe with a toolbar for switching between preset and custom viewport sizes.

You do not need to resize your browser window every time you test responsiveness. Install ERT, configure your sizes, and preview your site from the admin settings screen.

Features

  • Test your site at multiple screen sizes from a single preview page
  • Six common viewport sizes included out of the box (320×480 through 1280×1024)
  • Add unlimited custom height:width pairs from the settings page
  • Customize toolbar background and foreground colors with the WordPress color picker
  • One-click “Check Your Site” link from the ERTP Settings admin page
  • Demo page is created automatically on activation and hidden from the Pages list
  • Settings link on the Plugins screen for quick access
  • Admin bar is hidden on the preview page for an accurate front-end view
  • Settings and preview restricted to users with the manage_options capability

How it works

  1. Activate the plugin. A private preview page titled “ERTP Site Check” is created automatically.
  2. Open ERTP Settings in the WordPress admin menu to configure viewport sizes and toolbar colors.
  3. Click Check Your Site to open the preview page in a new tab.
  4. Use the toolbar to switch between configured viewport sizes while your live site loads inside the iframe.

Default viewport sizes

  • 320 x 480
  • 480 x 600
  • 540 x 960
  • 600 x 960
  • 1024 x 600
  • 1280 x 1024

Sizes are entered as height:width pairs, comma-separated (for example: 320:480, 768:1024).

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