Free CRO Experiment Library

A curated collection of conversion-rate-optimization test ideas you can adapt for your own site. Each experiment includes a hypothesis, the change to make, the primary metric to watch, and the risk level—so you can prioritise what to run first.

Built and maintained by CROLabs, an AI-powered CRO platform for marketers, founders, and ecommerce teams.

Browse by Page Type

Landing Page Tests

12 experiments

Hero copy, proof blocks, CTA placement, form friction, and more.

Pricing Page Tests

10 experiments

Toggle defaults, plan emphasis, trust signals, FAQ order, comparison tables.

Signup & Demo Page Tests

10 experiments

Form length, social proof, incentive framing, CTA wording, and objection handling.

Tools & Templates

A/B Test Brief Template

Interactive template

Fill in hypothesis, metric, audience, duration, and stop criteria—then export.

Sample-Size Calculator

JavaScript tool

Estimate how many visitors you need before calling a test.