--- title: "OnBuy image compressor: under 10 MB, free | Herofab" description: "Compress product photos under the 10 MB limit of OnBuy. Saved as JPG, never cropped. Free, in your browser; nothing is uploaded." url: https://herofab.app/tools/onbuy-image-compressor language: en updated: 2026-10-13 --- # 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. ![Black-dial watch with a mesh strap on white, three-quarter view](https://herofab.app/img/ex/watch-packshot-1100.webp) Made with Herofab · Packshot studio ## Under 10 MB per image, saved as JPG Limits come from each platform's own help pages, summarised in the [guides](https://herofab.app/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](https://docs.api.onbuy.com/) · 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 [OnBuy image guide](https://herofab.app/guides/onbuy-image-requirements) · [Product photo checker](https://herofab.app/tools/onbuy-product-photo-checker) · [OnBuy image resizer](https://herofab.app/tools/onbuy-image-resizer) · [Image compressor](https://herofab.app/tools/image-compressor) ## Compressors by platform. [bol](https://herofab.app/tools/bol-image-compressor) · [Walmart](https://herofab.app/tools/walmart-image-compressor) · [Kaufland](https://herofab.app/tools/kaufland-image-compressor) · [Shopee](https://herofab.app/tools/shopee-image-compressor) · [Cdiscount](https://herofab.app/tools/cdiscount-image-compressor) · [Ricardo](https://herofab.app/tools/ricardo-image-compressor) · [Heureka](https://herofab.app/tools/heureka-image-compressor) · [Facebook & Instagram Shop](https://herofab.app/tools/facebook-instagram-shop-image-compressor) · [Miinto](https://herofab.app/tools/miinto-image-compressor) · [Vestiaire Collective](https://herofab.app/tools/vestiaire-collective-image-compressor) · [Coupang](https://herofab.app/tools/coupang-image-compressor) · [Google Ads](https://herofab.app/tools/google-ads-image-compressor) · [Amazon A+ Content](https://herofab.app/tools/amazon-a-content-image-compressor) · [Amazon Brand Store](https://herofab.app/tools/amazon-brand-store-image-compressor) · [LinkedIn ads](https://herofab.app/tools/linkedin-ads-image-compressor) · [Snapchat ads](https://herofab.app/tools/snapchat-ads-image-compressor) · [Google Business Profile](https://herofab.app/tools/google-business-profile-image-compressor) · [Temu](https://herofab.app/tools/temu-image-compressor) · [Newegg](https://herofab.app/tools/newegg-image-compressor) · [BigCommerce](https://herofab.app/tools/bigcommerce-image-compressor) · [Webflow](https://herofab.app/tools/webflow-image-compressor) · [Big Cartel](https://herofab.app/tools/big-cartel-image-compressor) · [Amazon Ads](https://herofab.app/tools/amazon-ads-image-compressor) · [Walmart Connect](https://herofab.app/tools/walmart-connect-image-compressor) · [Reddit Ads](https://herofab.app/tools/reddit-ads-image-compressor) · [Mailchimp](https://herofab.app/tools/mailchimp-image-compressor) · [Klaviyo](https://herofab.app/tools/klaviyo-image-compressor) · [Wolf & Badger](https://herofab.app/tools/wolf-badger-image-compressor) · [THE ICONIC](https://herofab.app/tools/the-iconic-image-compressor) · [Trade Me](https://herofab.app/tools/trade-me-image-compressor) · [noon](https://herofab.app/tools/noon-image-compressor) · [SHEIN](https://herofab.app/tools/shein-image-compressor) · [AliExpress](https://herofab.app/tools/aliexpress-image-compressor) · [eMAG](https://herofab.app/tools/emag-image-compressor) · [Tradera](https://herofab.app/tools/tradera-image-compressor) · [Folksy](https://herofab.app/tools/folksy-image-compressor) · [ZALORA](https://herofab.app/tools/zalora-image-compressor) · [Taboola](https://herofab.app/tools/taboola-image-compressor) · [Outbrain](https://herofab.app/tools/outbrain-image-compressor) · [Omnisend](https://herofab.app/tools/omnisend-image-compressor) ## 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](https://docs.api.onbuy.com/) is the final reference.