Compress images for OnBuy.
Drop your photos and download them under 10 MB, the file-size limit in OnBuy's image rules. The quality is lowered first and the pixel dimensions only when needed; the photo is never cropped. It runs in your browser; nothing is uploaded.
Under 10 MB per image, saved as JPG
Limits come from each platform's own help pages, summarised in the guides (checked 24 September 2026).
What OnBuy asks for.
Source: OnBuy — OnCommerce API Documentation v2 (Image Download Requirements; Content Scope); Seller Terms v3.0.0 · checked 12 October 2026
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.
- Limit used
- Under 10 MB per image, saved as JPG
- Pixels kept
- A photo with a side over 1,000 px is scaled down to that limit first. The rules checked here state no minimum pixel size, so the tool stops before the photo falls under a quarter of its original width.
- 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
Compressors by platform.
Compressing for OnBuy, answered.
What is the image file-size limit on OnBuy?
10 MB per image, according to the rules summarised in the OnBuy guide. This tool saves each photo as a JPG under that size.
Is JPG accepted on OnBuy?
Yes. The formats OnBuy lists are JPEG, PNG, and GIF.
Does compressing for OnBuy change the pixel size?
Only when lowering the quality is not enough to get under 10 MB. A photo with a side over 1,000 px is scaled down to that limit first. The rules checked here state no minimum pixel size, so the tool stops before the photo falls under a quarter of its original width.
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 is the final reference.
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