A/B Testing for Squarespace
Optimize Squarespace templates, service pages, and store listings with lightweight A/B tests. Add the Stellar snippet via Code Injection, build variants without code, and track what drives signups and sales.
🚀 For Squarespace creators, agencies, and store owners
Set up A/B testing on your Squarespace site in under 60 seconds
How it works on Squarespace
Install the Stellar snippet
Add one line of code to your Squarespace site head. Direct installation is recommended for anti-flicker and fastest variant delivery.
Create an experiment and variants
Use the no-code visual editor to change headlines, buttons, images, or layout on live pages—no redeploy required.
Configure targeting rules
Limit experiments to specific URLs, devices, or countries so tests only run for the audience that matters.
Add conversion goals
Track button clicks, form submissions, product page visits, or checkout funnel steps relevant to your Squarespace site.
Analyze results and ship winners
Review real-time stats in Stellar, optionally sync conversions to GA4, and apply the winning variant.
Install the Stellar snippet on Squarespace
Paste your snippet in Settings → Advanced → Code Injection → Header. Direct head install is recommended so anti-flicker works correctly. Full install guide →
- In Squarespace, open Settings → Advanced → Code Injection
- Paste your Stellar snippet into the Header field
- Save changes
- Visit a live page (not just the editor) and confirm stellar.js loads in dev tools
Code Injection requires a Business plan or higher on most Squarespace tiers. Confirm your plan includes header injection before starting.
Pre-launch QA checklist
Run through this list before sending traffic to an experiment on Squarespace.
- Confirm stellar.js loads in the Network tab on pages where experiments should run
- Verify only one install path is active (direct head install or GTM—not both)
- Match anti-flicker settings to your install method (direct install recommended)
- Clear CDN, theme, or platform cache after saving snippet changes
- Test in an incognito window with ad blockers disabled
- Verify Code Injection saved on the correct site (if you manage multiple Squarespace properties)
- Test on password-protected vs. public pages if applicable
- Clear Squarespace CDN cache if changes do not appear within a few minutes
- Confirm Commerce product pages load the snippet on both desktop and mobile templates
Squarespace limitations and gotchas
Plan-gated code injection
Header Code Injection is not available on all Squarespace plans. Upgrade or use an eligible plan before installing Stellar.
Template lock-in
Some Squarespace 7.1 sections render dynamically. Validate the visual editor can target elements on your specific template before launching high-traffic tests.
Checkout attribution
Commerce checkout pages may limit third-party scripts. Use page-visit or click goals on pre-checkout steps and validate purchase tracking separately.
GA4 tracking for Squarespace experiments
Stellar sends conversion events to Google Analytics 4 via the Measurement Protocol, so experiment data appears alongside your other Squarespace analytics. GA4 integration setup →
Event name: stellar_experiment_conversion
Register these custom dimensions in GA4 (Event scope):
experiment_id,experiment_namevariant_id,variant_nameconversion_id,conversion_name
Keep your Squarespace site fast while you test
Stellar's 5.4KB async snippet loads without the bloat of legacy testing platforms—important for SEO and Core Web Vitals on Squarespace.
At just 5.4KB and served on a CDN, Stellar's pure JS script is 25x smaller than competitors like VWO or AB Tasty. With minimal dependencies and a fixed size regardless of test count, it preserves your website's speed, Core Web Vitals, user experience, and SEO performance.
Why teams choose Stellar for Squarespace
Squarespace A/B test ideas to run first
Service page headlines
Test value props on Squarespace service and about pages.
Product detail layout
Compare image gallery styles and buy button placement on Commerce PDPs.
Newsletter signup
Test popup vs. inline newsletter blocks for list growth.
Template hero variants
Swap hero layout styles on portfolio and agency templates.
Booking CTAs
Test scheduling button copy and placement on consultant sites.
Pricing presentation
Compare package cards and payment plan messaging.
Pricing
Free
Up to 25k MTU
Built-in analytics
Visual web editor
Custom CSS & JS editor
AI editor assistant
Basic A/B testing
Up to 3 variants per experiment
Up to 2 experiments running simultaneously
Pro
50k MTU included
Unlimited variants
Unlimited concurrent experiments
Advanced targeting rules
Dynamic keyword insertion
AI insights & recommendations
Priority support
Enterprise
Custom MTU volume
Custom solutions
Integrations support
We dynamically bill in small increments of 1k MTU, so you only pay for what you actually use and never overpay
No hidden fees, no large fixed blocks. Scale smoothly as your traffic grows with predictable, usage-based billing
We only count users who actually see experiments. Multiple experiment views from the same user count as just 1 MTU
Trusted by marketers running experiments
Jake M. — Performance Marketer
⭐️⭐️⭐️⭐️⭐️
Other testing tools have a million features I don't need. Stellar focuses on what actually matters: speed, ease of use, and great analytics.
Richard R. — E-commerce Owner
⭐️⭐️⭐️⭐️⭐️
Stellar is the real deal. No unnecessary features, no steep learning curve. Just quick tests that actually improve our store.
Ben C. — Growth Hacker
⭐️⭐️⭐️⭐️⭐️
It does the job without slowing down our pages. If you're running tests and care about performance, this is the tool to use.
Frequently Asked Questions
More platforms
Stellar works on any site where you can add head code. Explore setup guides for other platforms: