Do cleaner checkout form fields lift mobile checkout conversion?
Our mobile checkout used shadowed form boxes and a high-contrast fees section. We tested cleaner fields with borders, clear field states and a calmer fees section. Conversion moved 0.4% over 12 days, too little to call.
Not significant Mobile 12 days Not called Reviewed
The hypothesis
By cleaning up the checkout form with clear borders, field states and a calmer fees section, we will make the form easier to read and fill in, resulting in more completed orders.
Earlier checkout rounds left a list of small design fixes unused. Together, they follow common design guidelines for forms: clear field edges, visible feedback when a field is active or wrong, and less visual weight on secondary details.
We expected these fixes to make the form look cleaner, give better feedback and be easier to use.
What we changed
We cleaned up the checkout form fields and toned down the fees section.
The control used box shadows on its fields and a high-contrast fees section. The variation swapped the shadows for simple field borders, styled the active, error and valid states of each field, and lowered the contrast of the fees section. It also placed the cursor in the first field when the page loaded. The same cleanup ran on desktop at the same time.
- Box shadows replaced with field borders
- Active, error and valid field states styled
- Fees section given lower contrast
- First field selected on page load
The result
Mobile conversion moved 0.4% in 12 days, too little to call.
Mobile conversion was 0.4% higher than the control after 12 days. The variation had leveled out with the control, and a longer run was unlikely to change the picture, so we paused it.
The desktop version ran at the same time and finished 0.5% below its control. Revenue moved by the same amount as conversion, since every order is the same price.
What we would do next
Visual polish alone did not change how many visitors finished.
The cleanup made the form tidier, but visitors who reached checkout finished at the same rate either way. At this step, people are already committed, so small styling changes had little room to move them. Our next checkout round tested urgency in the copy instead.