What you can change on Wix
You can’t change Wix’s platform code, but your page design choices have a big effect on load time. Each fix below lists the metric it usually moves; check that metric in your test result to pick where to start.
Wix speed test & optimization
Wix manages hosting, caching and code delivery, so your levers are what you put on the page: images, apps, fonts, video and animation. Test your key pages and trim what’s heavy.
Runs Google Lighthouse on mobile and desktop at the same time, plus real-user Chrome data. Takes about 20–40 seconds.
- LCP
Keep the top of the page simple
One hero image or a heading loads faster than a video background, a slideshow or stacked animations. Move heavy elements further down the page.
- LCP
Upload sensibly sized images
Wix converts and resizes images automatically, but very large originals and many full-width images still add weight. Use fewer, purposeful images.
- TBT
Remove unused apps and widgets
Each app from the Wix App Market adds code. Delete apps you no longer use, not just hide them.
- FCP
Limit fonts and animations
Stick to two font families and avoid scroll-triggered animations on every section.
- All
Split very long pages
Long one-page sites with many sections, galleries and embeds load everything at once. Split them into separate pages.
Common mistakes
- Embedding many third-party HTML iframes (social feeds, booking widgets) above the fold.
For platform-independent fixes, see the speed optimization checklist, and check page weight with the page size checker.
Questions people ask
Why is my Wix site slow on mobile?
Mobile tests use a throttled phone, so video backgrounds, large galleries, animations and app widgets near the top of the page hurt most. Simplify the first screen.
Can I improve Core Web Vitals on Wix?
Yes, within your design choices: lighter first screens, fewer apps, and fixed-size elements to avoid layout shift. Wix also publishes its own performance improvements over time.