Compress Images for Shopify — Free, Fast & Private
Shopify allows images up to 20 MB and 4472×4472 pixels, but uploading files anywhere near those limits hurts your store speed. Shopify\'s own research shows that a 1-second improvement in load time can increase mobile conversions by up to 27%. Image optimisation is the single biggest speed win for most stores.
The ideal Shopify product image is 2048×2048 pixels in JPEG at 80% quality, which produces files around 200-400 KB. This is large enough for Shopify\'s built-in zoom feature while keeping pages fast. For collection and banner images, match the exact dimensions your theme expects.
Shopify automatically generates multiple sizes of each uploaded image for responsive loading. But it does not recompress — if you upload a 5 MB image, the largest variant stays roughly 5 MB. Compressing before upload is essential because Shopify will not do it for you.
WebP is supported in Shopify themes and most modern browsers. Shopify\'s CDN can serve WebP automatically through the image_url filter with format: \'webp\'. If your theme uses this, upload high-quality JPEGs and let Shopify handle format conversion. If it does not, upload WebP directly for 25-30% smaller files.
MiniPx compresses your product photos instantly in your browser. No files leave your device. Drag in your entire product shoot, select JPEG at 80% quality, and batch-process everything in seconds. Your images are ready for Shopify upload immediately.