Allegro rule
Allegro thumbnail images must use a white background
Allegro requires the gallery thumbnail to sit on a white background so listings render consistently across search results and category grids.
Audit my Allegro imagesSee all rulesSource: help.allegro.com · Last verified 2026-05-31
What we check
CatalogPrep samples the outer edge band of the thumbnail and verifies the dominant background is white within tolerance.
How to fix
Remove the existing background and rebuild a white canvas. CatalogPrep applies this automatically when the subject mask is clean.
Detection summary
- Severity
- blocking
- Auto-checkable
- Yes
- Auto-fixable
- Yes
- Manual review
- Not needed
- Last verified
- 2026-05-31