Check Your Wix Site Speed
Run a Lighthouse audit on your Wix site and export the full JSON report. Wix has made significant performance improvements in recent years, but individual sites still vary widely — this report shows exactly where your site stands.
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Loading...Common performance issues on Wix sites
These are the issues most frequently found in Wix Lighthouse audits. Your report will tell you exactly which ones apply to your site.
Large JavaScript payload from Wix platform
Wix loads a significant amount of platform JavaScript to power its editor-ready runtime. This contributes to TBT and cannot be fully eliminated, but minimising additional scripts helps considerably.
Wix apps adding blocking scripts
Each Wix App you add to your site can contribute additional JavaScript. Apps like Wix Chat, booking systems, and reviews widgets are common sources of TBT increases.
Images without optimized formats
Wix has improved its image handling, but images uploaded at very high resolutions or added via specific section types may not always be delivered in the optimal format and size.
Cumulative Layout Shift from late-loading sections
Wix's section-based layout system can cause CLS if sections below the fold load in and shift visible content, especially on mobile devices.
Pro tip: In Wix's Site Settings, enable "Turbo" (now called Site Booster) to activate Wix's built-in CDN and caching optimisations. Then use PageSpeed Exporter to re-audit and confirm the improvement in your LCP and TTFB.