WordPress A/B testing

Split test complete WordPress themes safely

Install the official plugin once, then compare installed WordPress themes site-wide or build visual variants on published pages without changing the site's active theme.

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Install location

Official Otter WordPress plugin

One shared installation powers every experiment, conversion goal, and report on this site.

  1. 01Upload the official Otter plugin and paste your project API key.
  2. 02Choose an installed alternate theme and open the prefilled test wizard.
  3. 03Review the site-wide split and conversion goal, then launch.

Ideas

What to test on WordPress

Start with the changes closest to the money. These are the ones teams on this platform run first.

Complete theme split tests
Block and classic theme comparisons
Elementor and page-builder pages
WooCommerce funnel experiments

Questions

WordPress A/B testing questions

Does Otter work with WordPress page builders?

Yes. Otter edits the rendered page in the browser, so it works with Elementor, Gutenberg, Divi, and most other page builders.

Can Otter split test complete WordPress themes?

Yes. The official plugin assigns visitors to installed themes per request without changing WordPress's active theme globally. Full-page caches must vary on the otter_theme_assignment cookie.

Do I need to edit my WordPress theme?

No. The official plugin installs Otter and runs theme assignments without modifying theme files.

Can I A/B test WooCommerce?

Yes. Otter also provides an official WooCommerce plugin with automatic product, checkout, purchase, and revenue events.

Built for WordPress

Run your first test this afternoon

One snippet, no build step, and results you can act on within days.

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