--- title: "Allegro main image checker — free, in your browser | Herofab" description: "Check a product photo against Allegro's main-image rules: background colour. Free, in your browser; nothing is uploaded." url: https://herofab.app/tools/allegro-product-photo-checker language: en updated: 2026-09-30 --- # Check your photo against Allegro's rules. Allegro 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. ![The brown leather tote alone on a white studio background, front view](https://herofab.app/img/ex/tote-packshot-1100.webp) Made with Herofab · Packshot studio ## Choose a marketplace and a photo. Rules come from each marketplace's own help pages, summarised in the [guides](https://herofab.app/guides/) (checked 27 September 2026). Size, file size and format are checked as well. ## What Allegro asks for. Source: [help.allegro.com](https://help.allegro.com/en/sell/a/what-a-thumbnail-is-and-how-to-set-it-according-to-our-rules-lL5oWko4Dc3), [Allegro — Rules for images in the gallery and in descriptions](https://help.allegro.com/en/sell/a/rules-for-images-in-the-gallery-and-in-descriptions-8dvWB8Y2PIq) · checked 27 September 2026 - **Main image:** Light, neutral background - **Size:** At least 500 pixels on the longer side; uploads up to 26 megapixels; images are shown at up to 2,560 × 2,560 pixels, and larger ones are scaled down proportionally - **File:** JPG, JPEG or PNG (WEBP also through the API or a file); any proportions, such as 1:1, 4:3 or 16:9; only the sRGB profile for full colour fidelity - **Background:** The thumbnail — the first image — on white, RGB 255.255.255; in the Fashion categories and kids' clothing and footwear, a uniform white or uniform light grey (HSV value V of at least 0.8); other gallery images may use any background - **Fashion thumbnails:** Allegro's Fashion guidance: clothing on a model, from the front, uncropped, taking up around 80% of the photo height and/or width; shoes, jewellery, watches, purses, backpacks and sunglasses without a model - **Models:** Models may appear with the product in any category; images in which Allegro recognises a face are hidden from the Allegro Product Catalog and the product change request form - **Not allowed:** On the thumbnail: watermarks, logos, text, icons, frames or other decorations; in gallery images: added text or your logo - **AI images:** Under the EU AI Act, AI-generated or AI-modified photos that might appear authentic must be labelled; Allegro names an AI-generated background and virtual models as examples, and its label option adds an AI label to the photo as a watermark [Allegro image guide](https://herofab.app/guides/allegro-product-image-requirements) · [Product photo checker](https://herofab.app/tools/product-photo-checker) ## 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. [Amazon](https://herofab.app/tools/amazon-product-photo-checker) · [Google Shopping](https://herofab.app/tools/google-shopping-product-photo-checker) · [Zalando](https://herofab.app/tools/zalando-product-photo-checker) · [Walmart](https://herofab.app/tools/walmart-product-photo-checker) · [Etsy](https://herofab.app/tools/etsy-product-photo-checker) · [TikTok Shop](https://herofab.app/tools/tiktok-shop-product-photo-checker) · [Kaufland](https://herofab.app/tools/kaufland-product-photo-checker) · [OTTO](https://herofab.app/tools/otto-product-photo-checker) · [Galaxus](https://herofab.app/tools/galaxus-product-photo-checker) · [Mercado Livre](https://herofab.app/tools/mercado-livre-product-photo-checker) · [Faire](https://herofab.app/tools/faire-product-photo-checker) · [Shopee](https://herofab.app/tools/shopee-product-photo-checker) · [Hood.de](https://herofab.app/tools/hood-de-product-photo-checker) · [CDON](https://herofab.app/tools/cdon-product-photo-checker) · [Fyndiq](https://herofab.app/tools/fyndiq-product-photo-checker) · [Cdiscount](https://herofab.app/tools/cdiscount-product-photo-checker) · [Ricardo](https://herofab.app/tools/ricardo-product-photo-checker) · [Heureka](https://herofab.app/tools/heureka-product-photo-checker) · [GLAMI](https://herofab.app/tools/glami-product-photo-checker) · [Best Buy Canada](https://herofab.app/tools/best-buy-canada-product-photo-checker) ## Allegro main images, answered. **What background does Allegro 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 Allegro product images be?** At least 500 px on the longer side, up to 26 MP, shown at up to 2,560 × 2,560; JPG or PNG. Fashion thumbnails: plain white or light grey. **Where do these figures come from?** From Allegro — Rules for images in the gallery and in descriptions, read on 27 September 2026. Marketplaces update their rules; the [official page](https://help.allegro.com/en/sell/a/rules-for-images-in-the-gallery-and-in-descriptions-8dvWB8Y2PIq) is the final reference. **Is my image uploaded?** No. The file is read and processed inside your browser; nothing is sent to a server.