---
title: "OnBuy product image size and requirements (2026) | Herofab"
description: "OnBuy product images: 500 × 500 pixels recommended, 1,000 × 1,000 maximum, up to 10 MB, JPG, JPEG, PNG or GIF, white background where possible."
url: https://herofab.app/guides/onbuy-image-requirements
language: en
updated: 2026-10-12
---

# OnBuy product image requirements

OnBuy product images: 500 × 500 pixels recommended, 1,000 × 1,000 maximum, up to 10 MB, JPG, JPEG, PNG or GIF, white background where possible.

![A pair of gold drop earrings on white](https://herofab.app/img/ex/drops-packshot-1100.webp)

Made with Herofab · Packshot studio

## All OnBuy image requirements

Source: [OnBuy — OnCommerce API Documentation v2 (Image Download Requirements; Content Scope); Seller Terms v3.0.0](https://docs.api.onbuy.com/). Checked 12 October 2026.

- **Formats:** JPG, JPEG, PNG and GIF only
- **Recommended:** 500 × 500 pixels for best results
- **Maximum:** 1,000 × 1,000 pixels
- **File size:** Maximum 10 MB
- **Background:** White background colour where possible; the photographic quality must be high
- **Image hosting:** Image URLs must be fully accessible over the public internet, without authentication, IP allowlisting, expiring signatures or token-based access; Imgur links are rejected
- **Not allowed:** Product pages must not contain nude images or obscene or discriminatory content
- **Shared across sites:** Default and additional image URLs are global content, shared across all OnCommerce sites such as OnBuy UK and OnBuy FR
- **Processing:** Only the image URL is checked when a product is submitted; images are downloaded and processed when the product is actually created

[Check your images — free](https://herofab.app/tools/image-size-checker)

## What OnBuy asks for, covered.

OnBuy recommends 500 × 500 pixels and sets a maximum of 1,000 × 1,000. Herofab's square 2K output is 2,048 pixels per side, above that maximum, so it has to be resized to 1,000 × 1,000 or smaller before upload. OnBuy asks for a white background where possible; Herofab's packshot studio delivers the product alone on a white studio background. Herofab images can be downloaded as PNG or JPG, two of the formats OnBuy accepts.

### Resize to 1,000 × 1,000

Square 2K output is 2,048 pixels per side, above OnBuy's 1,000 × 1,000 maximum.

### White where possible

Packshot studio delivers the product alone on a white studio background.

### PNG or JPG

Herofab images can be downloaded as PNG or JPG, two of the formats OnBuy accepts.

[Start free](https://app.herofab.app/login?lang=en)

## OnBuy, answered.

**What size should OnBuy product images be?**

OnBuy product images: 500 × 500 pixels recommended, 1,000 × 1,000 maximum, up to 10 MB, JPG, JPEG, PNG or GIF, white background where possible.

**Which file formats does OnBuy accept for product images?**

JPG, JPEG, PNG and GIF only. Source: OnBuy — OnCommerce API Documentation v2 (Image Download Requirements; Content Scope); Seller Terms v3.0.0, checked 12 October 2026.

**How large can a product image file be on OnBuy?**

Maximum 10 MB. Source: OnBuy — OnCommerce API Documentation v2 (Image Download Requirements; Content Scope); Seller Terms v3.0.0, checked 12 October 2026.

**What background should product images have on OnBuy?**

White background colour where possible; the photographic quality must be high. Source: OnBuy — OnCommerce API Documentation v2 (Image Download Requirements; Content Scope); Seller Terms v3.0.0, checked 12 October 2026.

**What is not allowed in product images on OnBuy?**

Product pages must not contain nude images or obscene or discriminatory content. Source: OnBuy — OnCommerce API Documentation v2 (Image Download Requirements; Content Scope); Seller Terms v3.0.0, checked 12 October 2026.

**Can I check my images before uploading?**

Yes. The free [image size checker](https://herofab.app/tools/image-size-checker) reads each file in your browser and tests it against these rules; the image is not uploaded.

**Where do these figures come from?**

From OnBuy — OnCommerce API Documentation v2 (Image Download Requirements; Content Scope); Seller Terms v3.0.0, read on 12 October 2026. Marketplaces update their rules; the [official page](https://docs.api.onbuy.com/) is the final reference.

[Virtual try-on](https://herofab.app/tools/virtual-try-on) · [Background removal](https://herofab.app/tools/background-remover) · [All guides](https://herofab.app/guides/)