OTTO rule
OTTO image filenames must avoid special characters and umlauts
OTTO's ingestion expects clean image filenames; special characters and German umlauts in a filename can stop the asset from attaching to the product.
Audit my OTTO imagesSee all rulesSource: api.otto.market · Last verified 2026-05-31
What we check
CatalogPrep inspects each export filename and flags special characters and umlauts that OTTO's ingestion does not accept.
How to fix
Rename files to plain ASCII without special characters or umlauts. CatalogPrep cleans filenames on export automatically.
Detection summary
- Severity
- warning
- Auto-checkable
- Yes
- Auto-fixable
- Yes
- Manual review
- Not needed
- Last verified
- 2026-05-31