Checks / Links, canonical and speed
Oversized images
Images over 300 KB slow the page for visitors and crawlers on mobile connections.
img_oversized · Links, canonical and speed · Warning
What to change
Compress the image, serve WebP or AVIF and size it to the space it fills.
How common it is
We have not measured how common this is on a sample of sites. Counts appear here when a study covers it.
About this check
| Check ID | img_oversized |
|---|---|
| Report section | Links, canonical and speed |
| Severity | Warning |
| How it is decided | Measured: read directly from the page or the server's response. |
| Added | Version 3, 19 October 2026 |
| Status | Measured in every report |
| Report gives the code | No, the fix is described in words |
Related checks
- Broken internal links
- Canonical points to a broken or redirecting URL
- Redirect loop
- Canonical points to a noindex page
- Canonical points to another page
- Pages refuse or do not answer our crawler
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