Test every word. Know what converts.
Deploy pixel-based A/B tests on headlines, CTAs, and body copy — no developers required. Get statistically significant results in days, not months.
Save time and money with our platform
Cut your workload in half — starting today
Recommend running for 2 more days
How it works
Install the pixel
Add a single line of JavaScript to your site. Works with any platform — WordPress, Shopify, custom builds. Takes under 30 seconds.
Create your test
Choose any text element on your page. Write your variations or let AI generate them. Set your traffic split and goals.
Watch results roll in
Copysplit tracks conversions in real time. Once statistical significance is reached, we auto-detect the winner and notify you.
Everything you need to test copy at scale
Zero-flicker testing
Copy swaps before the page renders, so visitors never see a flash of changed content.
Element-level targeting
Test any text element using CSS selectors — headlines, buttons, paragraphs, even meta descriptions.
Statistical significance engine
Built-in Bayesian analysis tells you exactly when you have enough data to declare a winner.
Traffic split controls
Manual 50/50, weighted splits, or let AI allocate traffic based on early performance signals.
Goal tracking
Track clicks, form submissions, scroll depth, time on page, or custom events as conversion goals.
Multi-page tests
Test the same copy change across multiple pages simultaneously to measure site-wide impact.
See it in action
A B2B SaaS company tested 'Start Free Trial' vs 'See It In Action' on their homepage CTA. Variant B won after 4,200 visitors.
An online retailer tested benefit-driven vs feature-driven headlines on their top 5 product pages.
A marketing team rolled out headline tests across 8 sites in one afternoon. Within 2 weeks, 6 of 8 tests had significant winners.
Available on every plan
Scale your testing as you grow.
| Feature | Starter | Growth | Agency |
|---|---|---|---|
| Active tests | 5 | Unlimited | Unlimited |
| Variations/test | 6 | Unlimited | Unlimited |
| Traffic split | Equal only | Equal + AI | Equal + AI |
| Auto-winner | ✓ | ✓ | ✓ |
Frequently asked questions
How does the pixel work?
The Copysplit pixel is a single line of JavaScript you add to your site’s <head> tag. It runs before the page paints, swapping text elements with your test variations instantly — no flicker, no layout shift. It works on any platform: WordPress, Shopify, Webflow, or custom-built sites.
Will testing slow down my site?
No. The pixel loads asynchronously and text swaps happen in under 50 milliseconds. We’ve tested on sites with millions of monthly visitors without any measurable impact on page load time.
How much traffic do I need?
It depends on your baseline conversion rate, but as a rule of thumb, you’ll want at least 1,000 visitors per variation to reach statistical significance within 1–2 weeks. Higher-traffic sites get results faster.
Can I test on single-page apps?
Yes. The pixel fully supports SPAs built with React, Next.js, Vue, Angular, and other frameworks. It automatically detects route changes and applies variations on navigation.