Free Shopify speed test

Judge it against other stores rather than against 100. Across the 1,533 Shopify stores in our benchmark the median mobile score was 47, with industry medians running from 40 in Beauty and Personal Care to 55 in Automotive Parts. So 50 on mobile already beats about half the stores we tested, and 60 clears the median of every industry we measured. Desktop sits much higher, at a median of 65, so read the two separately rather than against each other. The full benchmark has the median for each industry.

The mobile test runs on a throttled 4G connection with the CPU slowed down, and desktop runs unthrottled. That costs more than most people expect. In our benchmark only 1% of stores passed the 2.5-second LCP threshold in the mobile lab test, against 68% in the desktop one. With real Chrome visitors across the whole store, 91% passed on mobile and 94% on desktop. Compare your mobile score to other mobile scores, not to your own desktop one.

Third-party script load, more than anything else. Across 1,533 stores we found that those running 5 or fewer detected third-party services had a median mobile score of 74, while the most common band, 21 to 30 services, sat at 44. Oversized images above the fold and theme JavaScript matter too, but script count is where most stores lose the points. For a walkthrough, see our site speed optimization guide.

Some far more than others, which is why removing apps at random rarely helps. We measured main-thread blocking for every third-party service across 1,533 stores: Google Tag Manager showed up on 90% of them and held the main thread for a median of 486ms, while review scripts had the weakest link to a lower score of any category. The full third-party breakdown lists what each service costs, and this tool shows which ones your storefront loaded.

Google uses Core Web Vitals from real Chrome visits as one of many ranking signals, so passing can help, but it doesn't guarantee better rankings. Measured across the whole store, 81% of the 1,533 stores we benchmarked pass all three on mobile and 77% on desktop. On the revenue side, a Deloitte and Google study found that a 0.1-second improvement in mobile load time increased retail conversions by 8.4%.