Split URL Testing
Conversion & UXAlso: Split Testing · Redirect Testing
Quick definition
Split URL testing is a method of comparing two or more completely separate web pages, each with its own URL, by sending a share of traffic to each. Unlike standard A/B testing, which swaps elements on a single page, split URL testing compares entirely different page builds.
How it varies across Australia
Split URL testing shows up more often in Australian ecommerce and lead-gen sites running full landing page rebuilds than in smaller sites, which tend to lean on lighter A/B testing tools instead. Adoption tracks closely with conversion rate optimisation (CRO) maturity generally.
See conversion and CRO maturity across Australian industries →What it actually means
Imagine two shopfronts on the same street selling the same product, laid out completely differently. Split URL testing is sending half your customers to shopfront A and half to shopfront B, then counting who buys more. Each shopfront is a full, independently hosted page with its own URL, rather than the same shopfront with one shelf moved.
This is the key difference from standard A/B testing, which usually swaps a headline, a call-to-action or an image on a single page using client-side JavaScript. Split URL testing compares structurally different pages, different layouts, different flows, sometimes different platforms entirely.
The use case is a full redesign or a rebuild you're not confident in yet. If you're testing a new checkout flow against the old one, or a completely restructured landing page against your current one, split URL testing lets you run both live and let the conversion rate decide the winner.
The tradeoff is duplication cost. You're maintaining two live pages, which means two sets of tracking, two sets of content to keep current, and two URLs Google has to make sense of while the test runs.
Split URL testing isn't for tweaking a button. It's for when you've rebuilt the whole room and want proof the new layout actually works.
How it shows up
Split URL testing shows up as a redirect rule sitting in front of two live pages, usually managed through a testing tool like Google Optimize's successors, VWO or Optimizely, or through a server-side redirect split by session. Analytics reports it as two separate URLs with their own conversion rate, bounce rate and traffic volume, which then get compared for statistical significance once enough sessions have accumulated.
It also shows up as a maintenance burden. Marketing teams that run split URL tests without a clear end date often end up with two live, half-updated versions of the same page months later.
The Australian context
Split URL tests need enough traffic to reach statistical significance in a reasonable timeframe, and Australia's smaller market means that takes longer than the same test would in the US or United Kingdom. A mid-size Australian ecommerce site might need double the runtime of a comparable US site to get a clean result, which is worth factoring in before committing to a long split URL test.
Where people get this wrong
Related terms
Common questions
When should I use split URL testing instead of A/B testing?
Use split URL testing when the change is structural, a new page layout, a different checkout flow, or a different platform entirely. If you're only changing copy, colour or a single element, standard A/B testing on one URL is faster and easier to maintain.
Does split URL testing hurt SEO?
It can if both URLs stay indexable during the test. Use noindex tags or canonical tags pointing to the primary URL, and keep the test running only as long as needed to reach a clear result.
How long should a split URL test run?
Until you reach statistical significance, which depends on your traffic volume and existing conversion rate. Smaller Australian sites often need several weeks rather than days to get a reliable read.
Can I run a split URL test and an A/B test at the same time?
Not on overlapping traffic without care. Running both at once on the same audience makes it hard to isolate which test caused which change in conversion rate. Segment traffic clearly or run them sequentially.
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About New Rebellion
New Rebellion is a marketing intelligence consultancy. We build tools, score Australian businesses on how their marketing actually performs, and publish Debrief every day. This dictionary is part of how we work in the open.
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