What Is Split Test Pro?

Split Test Pro is an A/B testing tool for HTML websites and Shopify stores. You define the visual difference between two versions of a page, send half your traffic to each, and let the app figure out which one drives more conversions.

What Is A/B Testing?

A/B testing splits your visitors into groups, shows each group a different version of the same page, and tracks which version performs better against a goal — usually a purchase, signup, or click. It replaces guesswork (“I think the orange button will work better”) with measured evidence.

What Split Test Pro Adds

• Three variant types. Test changes with CSS (the most common), full JavaScript for DOM rewrites, or a URL redirect to compare two completely different pages.
• No code deployments. Variants are injected by a single script tag (HTML) or a Shopify app extension. Your theme files and source code stay untouched.
• Bayesian statistics. Instead of waiting weeks for a frequentist p-value to cross some threshold, you get a continuously-updating “probability to be best” you can trust as soon as you have enough data.
• AI review. An on-demand AI summary of any running experiment — useful for sanity-checking a result before you act on it.
• Auto-captured screenshots. Every variant gets a screenshot so you can see what visitors actually see.
• Built-in goal tracking. Define what counts as a conversion and start measuring. Shopify stores get the full purchase funnel for free.

How It Works

1. A visitor lands on a page that matches one of your experiments.
2. They’re assigned to a variant deterministically (a cookie keeps the assignment consistent across visits).
3. The variant’s CSS or JS is injected before the page paints — no flicker, no flash of the original.
4. Conversion events are tracked automatically (Shopify) or via a small JS call (HTML).
5. Results are computed continuously. When one variant has a high enough probability of being best, you declare a winner and apply the change permanently.

Who It’s For

• Marketers and store owners who want to test changes without filing a developer ticket.
• Designers validating a redesign one element at a time.
• Developers running structured experiments on landing pages, product pages, or signup flows.

Next Steps

If you’re on a generic HTML site, start with Installing on an HTML Site.

If you’re on Shopify, head to Installing on Shopify.

Already installed? Take the dashboard tour or jump straight to Your First Experiment.