| Shopify | Online Store → Themes → ⋯ → Edit code → layout/theme.liquid | Paste it on the line just before </head>, then Save. |
| Webflow | Site settings → Custom code → Head code | Save, then publish your site. Custom code needs a paid site plan. |
| Wix | Settings → Custom code → Add Custom Code | Choose All pages and place it in Head. Needs a premium plan and a connected domain. |
| Squarespace | Settings → Developer tools → Code injection → Header | Save. Code injection needs a Core plan or higher. |
| Framer | Site settings → General → Custom code → End of <head> tag | Save, then publish. |
| Ghost | Settings → Code injection → Site header | Save. |
| Anything else | Your site’s main layout or template | Paste it just before </head> so it loads on every page. |