www.shopify.com

The numbers

First visit

0.220 g CO₂e

Return visit

<0.001 g CO₂e

Hosting

verified green

LCP

372 ms

CLS

0.001

TTFB

59 ms

At 10,000 views a month this page emits about 19.8 kg CO₂e a year, roughly 81 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 0%, and world-average grid intensity. How we calculate this

1. Reduce JavaScript payloadsave ~0.0085 g/visit (94 kB)Medium impact · moderate effort

   39 scripts total 376 kB on the wire (1.17 MB decoded). Bundles this size usually carry a lot of unused code.

   Split bundles per route, tree-shake dependencies, and audit with a bundle analyzer or coverage profile. A 25% cut is a conservative target for bundles this size.

   • Wrapper-DIazPAhS.js52 kB
   • utils-BbTCqdPp.js46 kB
   • react-dom-BDFqAWxU.js41 kB
   • route-DH7z7HuN.js41 kB
   • chunk-KS7C4IRE-B4v21o96.js40 kB

   WSG 3.2: Minify and remove unused codeWSG 3.3: Modularize bandwidth-heavy components
2. Defer video and audioMedium impact · quick fix

   7 videos autoplay.

   Never autoload media: use preload="none" with a poster image, load players on interaction, and stream in an efficient codec (AV1/HEVC).

   • d3c0fbd5-4c3b-4a6f-9c05-521669c55c8c0 B
   • d3c0fbd5-4c3b-4a6f-9c05-521669c55c8c0 B

   WSG 2.9: Optimize media to reduce resource use
3. Optimize web fontssave ~0.0054 g/visit (60 kB)Advisory · quick fix

   4 font files total 170 kB.

   Subset fonts to used glyphs, prefer one variable font over multiple weights, serve WOFF2 only, and consider system fonts for UI text.

   • 5949cd393a8375a896fd0a9b74307666.woff268 kB
   • 8e7a81acb91d51d6051bfb7f97e8ecaa.woff235 kB
   • 85640034fdc1068cdb17d5e74ab9876d.woff234 kB
   • 5ed4b67d15b44e848aaae29d2e30ec03.woff233 kB

   WSG 2.11: Use optimized web typography
4. Remove the entry redirectAdvisory · quick fix

   The address that was scanned goes through 1 redirect before the document is served, ending at https://www.shopify.com/. Every hop is a full round trip on a connection that has not warmed up yet.

   Point links, sitemaps and canonical tags at the final address, and make the host redirect in one hop rather than chaining http to https to www.

   • https://shopify.com/redirects to https://www.shopify.com/

   WSG 4.4: Setup necessary error pages and redirection links
5. Simplify the document structureAdvisory · larger effort

   The page renders 2286 DOM elements, above the 1,500 guideline. Large trees cost memory and CPU on every visitor's device.

   Flatten wrapper markup, render long lists virtually or paginate, and prefer semantic elements over nested divs.

   WSG 3.6: Ensure code follows good semantic practices

Where the bytes are

• Data (fetch)826 kB · 3 req
• JavaScript376 kB · 39 req
• Images311 kB · 27 req
• Fonts170 kB · 4 req
• HTML80 kB · 1 req
• CSS54 kB · 2 req
• Audio / video0 B · 2 req