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Squarespace fix guide

Responsive Images Missing srcset or sizes Attributes on Squarespace

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.

Squarespace fix path

How to fix this on Squarespace

Check page settings, navigation, and code injection.

  1. 1Identify whether this is page-level or site-level.
  2. 2Apply the fix.
  3. 3Republish and confirm.

After you fix it

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

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