PF
PreFlight

Find what's breaking your
Shopify storefront

PreFlight scans any Shopify store for hidden elements, CSS conflicts, z-index issues, and third-party app interference. Get a health score and copy-paste fixes in seconds.

Free forever for 5 scans/month. Need more? See Pro plan →

Join 200+ Shopify app developers. No spam, ever.

What you get

Sample Output
78 /100
allbirds.com
2 issues detected. CSS conflicts may affect buyer experience.
✓ Shopify Store ⏱ 1847ms 🔍 3,247 elements
WARNING
CSS Rule Conflict — Font Size Override
Klaviyo and Yotpo applying conflicting rules to .product-form__submit
.product-form__submit { font-size: 14px !important; }
WARNING
Z-Index Conflict — Sticky Header vs. Cart Drawer
Cart drawer renders behind header on certain scroll positions
.cart-drawer__overlay { z-index: 101; }
INFO
Third-Party Script Modifying Product Form
ReCharge Subscriptions modifies .product-form__cart-submit after page load
or scan your own store

How it works

🔗
1. Paste URL
Drop in any Shopify store URL — yours or a merchant's
🔍
2. AI Scans
Detects CSS conflicts, z-index issues, and third-party app interference
⚡
3. Get Fixes
Copy-paste CSS fixes with a health score. No guesswork.

Built for Shopify App Developers

Stop debugging blind. Know exactly what's breaking before merchants call.

💥
Theme conflicts breaking your UI
Your app looks perfect in dev, then breaks on 30% of themes. PreFlight tells you exactly which CSS rules conflict and why — before a merchant opens a ticket.
⏱️
Hours debugging CSS across stores
Instead of manually inspecting each merchant's storefront, run a 2-second diagnostic scan and skip straight to the fix. What used to take hours takes seconds.
😤
Merchants blaming your app for theme issues
When something breaks, merchants blame the last thing installed — you. PreFlight pinpoints the actual conflict source so you can respond with proof, not apologies.
Early Access

Join 200+ Shopify app developers

Get notified when we launch the Shopify App Store listing, plus early access to bulk scanning and CI/CD integrations.

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See it on a real store

Watch PreFlight scan allbirds.com in real-time. No account, no email, no friction.

Takes 2 seconds. Works on any Shopify store.