Allegro Product Image Requirements: Thumbnail and Gallery Rules

Allegro's rules for gallery and description photos set the limits in the table below. The same page does not state a file size limit, so we do not give one. The right-hand column is our working recommendation, not an Allegro rule.

The thumbnail is always the photo you set first in the listing form. Allegro asks you to show products only on a white background, RGB 255.255.255, without frames or other decorations. A plain light gray background with an HSV value (V) of at least 0.8 is allowed only in listed Fashion, Kids and Sport and tourism categories, such as clothing, shoes, bags and luggage.

There are exceptions. Used, refurbished or damaged items on personal accounts, certain categories on business accounts, auction items in some fashion categories, and some art, furniture, garden and motoring categories can use other backgrounds; the help page lists them in full. Sellers with individual agreements may follow those terms instead.

On the thumbnail, Allegro does not allow logos in the background, whether the product's or your shop's, added text, icons or graphics such as arrows, units of measure, watermarks, or delivery times such as 'wysyłka w 24h'. A brand logo is fine when it is visible on the product or its packaging. Allegro says it may impose sanctions under its terms for a non-compliant thumbnail, and that sorting by relevance takes the thumbnail rules into account.

Gallery and description photos are looser. Any background color is allowed. You cannot add your shop name or logo, order-fulfillment information, or text describing product features. You can show text printed on the product or its original packaging, the brand logo of original products, dimensions written as numbers and units, and certificates and markings required by law.

Allegro's gallery rules say that if you publish a deepfake, an image generated or significantly altered by AI, you must tell buyers. Its FAQ covers images generated or modified by AI that may look authentic, with examples: an image generated from scratch, a photo of a real product with an AI-generated background, and virtual models presenting the product. It says the duty applies only to deepfake-type photos, and that deciding whether a photo needs a label is the seller's responsibility.

Allegro links this to the EU AI Act, Regulation (EU) 2024/1689, and says the relevant provisions take effect on 2 August 2026. It offers a labeling option when you add photos through the product catalog, the listing form, a file or the API, which adds an AI label to the image as a watermark. Once saved, the declaration cannot be changed.

Picmato does not clip your product. It generates a fresh studio shot, directed to a plain white studio background, and can plan lifestyle scenes for the rest of the set. AI renderers do not guarantee an exact RGB value, so check the background with a color picker before uploading. Picmato images are AI-generated, and Allegro's own examples of images that may need an AI label include a real product photo with an AI-generated background. Allegro leaves that decision to the seller, so read its labeling rules, in force from 2 August 2026, before you upload. Picmato does not check files against Allegro's rules, so confirm the current standard on Allegro's help pages.