The image format you choose for your eCommerce store affects load speed, product photo quality, customer trust, and Google rankings. With multiple viable formats available in 2026 — JPEG, PNG, WebP, and increasingly AVIF — choosing the right one for each use case can make a meaningful difference to your store's performance and conversion rate.
WebP — The Best Overall Choice for eCommerce
WebP is the recommended format for most eCommerce images in 2026. It delivers 25–35% smaller file sizes than JPEG at equivalent quality, and 26% smaller than PNG for images with transparency. All major browsers — Chrome, Firefox, Safari, and Edge — now support WebP fully, meaning there are no compatibility concerns for modern shoppers.
Smaller product images mean faster page loads, better Core Web Vitals scores, and lower bounce rates. For a product category page with 50 product thumbnails, switching from JPEG to WebP can reduce total page weight by several megabytes — which is the difference between a 2-second and 4-second load time on mobile. Use our format converter to convert existing product images to WebP instantly.
JPEG — Still Valid for Product Photography
JPEG remains a perfectly valid choice for product photographs, particularly if you are not able to serve WebP. Use JPEG at 80–85% quality for product photos with complex backgrounds (lifestyle shots, models, textured surfaces). The key advantage of JPEG is universal compatibility — every device and every browser handles it correctly.
The key limitation: JPEG does not support transparency. Any product that needs a transparent or white background cut out should use PNG or WebP, not JPEG.
PNG — For Products on White Backgrounds
PNG is the correct choice specifically for products photographed on a pure white or transparent background — the standard product photography format used by Amazon, eBay, and most major marketplaces. PNG preserves sharp, clean edges around the product cutout, unlike JPEG which introduces compression artefacts at edges.
The downside: PNG files are significantly larger than JPEG for complex product photos. Consider converting PNG product photos to WebP for your website while keeping the PNG originals as masters for marketplaces that require them.
AVIF — The Future Format
AVIF is a newer format that achieves up to 50% smaller files than JPEG at similar quality. Browser support is now excellent in Chrome, Firefox, and Safari. Some eCommerce platforms (including Shopify) automatically serve AVIF to supported browsers. If your platform supports it, AVIF is worth exploring — but WebP is the safer choice for broad compatibility in 2026.
Format Decision Guide
Frequently Asked Questions
Common questions about e-commerce image sizes and optimization.
Should eCommerce product images be JPEG or PNG?
Use PNG for products on white or transparent backgrounds for clean cutouts. Use WebP or JPEG for lifestyle product photos with complex backgrounds. WebP is the best overall choice for website display as it is smaller than both.
Is WebP better than JPEG for eCommerce?
Yes, WebP produces 25-35% smaller files than JPEG at equivalent quality. Smaller images load faster, improve Core Web Vitals, and reduce bounce rates — all of which positively affect sales.
What image format does Amazon require for product photos?
Amazon requires JPEG (JPG) format for main product images on a pure white background. They accept TIFF, PNG, and GIF for additional images. Your website can use WebP for faster loading while keeping JPEG versions for marketplace uploads.
Does image format affect SEO for online stores?
Yes. Image format affects file size, which affects page load speed, which affects Core Web Vitals scores, which Google uses as a ranking factor. Converting to WebP consistently improves load times and can improve rankings.
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