How can I achieve better performance for my Webflow website on mobile devices, as it currently has a low score on mobile performance tests compared to desktop performance?

TL;DR
  • Optimize images with WebP format, lazy loading, and responsive sizing; remove unused large assets.
  • Minimize third-party/custom scripts and place them in the footer with async/defer.
  • Simplify mobile layouts by reducing animations, avoiding complex nesting, and limiting sticky elements.
  • Use fewer fonts and rely on system fonts for faster load times.
  • Clean up unused assets and avoid large media files on mobile views.
  • Enable Webflow’s minification and performance settings in Project Hosting.
  • Test mobile performance with Lighthouse or PageSpeed and address key metrics like FCP, LCP, and FID.

Improving your Webflow website’s mobile performance involves optimizing content, styling, and scripts to reduce load time and increase interactivity on smaller devices.

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1. Optimize Images for Mobile

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  • Use WebP format for all images, which offers better compression than JPG or PNG.
  • Set image widths using Webflow’s responsive settings, so smaller images load on mobile.
  • Enable lazy loading by selecting each image and enabling the "Lazy load" checkbox from the Element Settings panel.
  • Remove unused large images set to display only on desktop.

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2. Limit Use of Custom Code and Third-Party Scripts

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  • Minimize embedded third-party resources, especially chat widgets, analytics libraries, and icon fonts.
  • Place third-party scripts in the Footer code section, not the header.
  • Use async or defer attributes when inserting custom scripts.

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3. Simplify Mobile Layouts

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  • Use minimal animations or interactions on mobile. Disable complex Webflow interactions for touch devices where performance is critical.
  • Review Section/Div structure to avoid deeply nested elements which increase rendering time on smaller processors.
  • Avoid fixed backgrounds or sticky elements whenever possible.

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4. Reduce Font Usage

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  • Limit font families and weights; load only the variants in use (e.g., only Regular and Bold, not 100–900).
  • Use system fonts where possible for faster rendering.

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5. Audit Page Size and Remove Unused Assets

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  • Use Webflow's Asset Manager to remove unused files.
  • Avoid large video or auto-play media files on mobile.
  • Apply display: none to desktop-only content instead of loading large elements and hiding them with visibility or z-index.

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6. Enable Webflow’s Performance Settings

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  • Under Project Settings → Hosting, enable:
  • Minify CSS
  • Minify JavaScript
  • Minify HTML
  • Enable Use secure frame headers for better resource handling

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7. Test and Adjust Using Lighthouse or PageSpeed Insights

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  • Run Google PageSpeed Insights on your site’s mobile version.
  • Focus on:
  • Time to First Contentful Paint (FCP)
  • Largest Contentful Paint (LCP)
  • First Input Delay (FID)
  • Use these insights to eliminate render-blocking resources and reduce cumulative layout shift (CLS).

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Summary

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To improve mobile performance in Webflow, optimize images, minimize third-party scripts, reduce visual complexity, and leverage built-in minification tools. Regularly test with PageSpeed Insights to identify and fix mobile-specific issues.

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