What is Shopify Checkout Extensibility?
Checkout Extensibility is Shopify's new framework for customizing the checkout experience. It replaces the old checkout.liquid file that Shopify Plus merchants used to customize their checkout pages.
The key change affecting conversion tracking: custom JavaScript can no longer run directly on checkout pages. Instead, Shopify introduced Web Pixels — a sandboxed environment where tracking scripts run securely.
Why Shopify Made This Change
Key Deadlines You Need to Know
Don't Wait Until the Deadline
Migrating early gives you time to test, identify issues, and ensure your conversion data remains accurate. Waiting until the last minute risks losing valuable tracking data during your migration.
What Will Break After the Deadline
How to Check If Your Setup Is Affected
Follow these steps to determine if your Google Ads tracking needs migration:
Common Signs Your Tracking Will Break
- • You see "gtag" or "dataLayer.push" in Additional Scripts
- • Your GTM container ID appears in checkout page source
- • You manually added Google Ads conversion code to Shopify
- • An agency set up tracking using "the old method"
Check Additional Scripts
Go to Settings → Checkout → Order status page and look for "Additional scripts"
Check for checkout.liquid (Plus only)
Go to Online Store → Themes → Edit code and search for checkout.liquid
Review Your Apps
Go to Settings → Customer events (or Apps → Customer events in some versions)
Test a Purchase
Use Google Tag Assistant to verify where your conversion tags are firing from.
Skip the migration headaches
ScaleUp uses Shopify's Web Pixel API natively — no checkout.liquid scripts to migrate.
Install Free on ShopifyTrusted by 2,000+ Shopify merchants
Your Migration Options
You have three main paths to migrate your Google Ads tracking to the new system:
Understanding Shopify Web Pixels
Web Pixels are Shopify's new tracking framework. Understanding how they work helps you choose the right migration approach.
Step-by-Step Migration Guide
Follow these steps to migrate your Google Ads tracking. We recommend Option A for most merchants.
Testing Your Migration
After migrating, verify everything works correctly before removing your old tracking code.
Important: Remove Old Code After Testing
Once you confirm the new tracking works, delete the old Additional Scripts code immediately. Running both will cause duplicate conversions and inflate your data.
Check Customer Events in Shopify
Go to Settings → Customer events. Your pixel should show as "Connected" with recent activity.
Use Google Tag Assistant
Complete a test purchase and verify the conversion tag fires on the thank-you page.
Check Google Ads Conversion Status
In Google Ads, go to Tools → Conversions. Your conversion action should show "Recording conversions."
Compare Data for 48-72 Hours
Run both old and new tracking in parallel briefly, then compare conversion counts before removing the old code.
Frequently Asked Questions
Sources
Migrate Your Tracking Today
ScaleUp uses Shopify's Web Pixel API — fully compatible with Checkout Extensibility. Set up in under 5 minutes with no migration hassle.
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Written by Jamie Scott
Founder & CEO, ScaleUp
Jamie has helped hundreds of Shopify merchants navigate platform changes and maintain accurate conversion tracking.
Helped 2,000+ Shopify merchants improve ROAS
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