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Webflow fix guide

Responsive Images Missing srcset or sizes Attributes on Webflow

Images are served without srcset or sizes attributes, forcing browsers to download full-size images regardless of the viewport. This wastes bandwidth on mobile and smaller screens.

Issue ID: CWV-SRCSET-SIZES-001Severity: moderateEffort: S

Why this matters

Images are served without srcset or sizes attributes, forcing browsers to download full-size images regardless of the viewport. This wastes bandwidth on mobile and smaller screens. This affects load speed, Core Web Vitals, and how many visitors stay long enough to convert.

Webflow fix path

How to fix this on Webflow

Use page settings, Designer, or project settings.

  1. 1Locate the element or setting causing the issue.
  2. 2Update it in Webflow.
  3. 3Publish and validate the output.

After you fix it

  • Inspect key images in DevTools and confirm srcset and sizes attributes are present

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