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.
- 1Identify whether this is page-level or site-level.
- 2Apply the fix.
- 3Republish and confirm.
After you fix it
- ✓Inspect key images in DevTools and confirm srcset and sizes attributes are present
Same fix, other platforms
Fix responsive images missing srcset or sizes attributes on a different CMS
Other fixes
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