Check your photo against OTTO's rules.
OTTO sets rules for the main image that can be measured from the photo: background colour. Drop a photo to see which ones it meets. It runs in your browser; nothing is uploaded.
Choose a marketplace and a photo.
Rules come from each marketplace's own help pages, summarised in the guides (checked 24 September 2026). Size, file size and format are checked as well.
What OTTO asks for.
Source: OTTO Market — Onboarding guide (18 January 2024) · checked 24 September 2026
- Main image
- Light, neutral background
- Format
- JPG or PNG, RGB colour space (CMYK is not accepted)
- Size
- At least 480 × 960 pixels; at most 4,500 pixels on any side
- Number
- At least one image per variant, no more than 10
- Main image
- Cut out, or on a light, neutral background such as light grey, white, off-white or light beige
How each rule is measured.
- Background colour
- The background colour is the median of a thin band along all four edges. A pure-white rule passes only when that band is RGB 255, 255, 255; near-white values such as 253 are reported with their exact colour.
- Scene photos
- Room and lifestyle photos have no plain background to measure against, so fill, edges and shadow are marked as not measured rather than guessed.
Checkers by marketplace.
OTTO main images, answered.
What background does OTTO require for the main image?
Light, neutral background. The checker reads the background from the edges of the photo and reports its exact RGB value.
What size should OTTO product images be?
JPG or PNG, at least 480 × 960 pixels, at most 4,500 pixels per side, RGB; the main image cut out or on a light, neutral background.
Where do these figures come from?
From OTTO Market — Onboarding guide (18 January 2024), read on 24 September 2026. Marketplaces update their rules; the official page is the final reference.
Is my image uploaded?
No. The file is read and processed inside your browser; nothing is sent to a server.
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