Why Platform-Specific Image Optimization Matters
Every ecommerce and social platform handles images differently. WooCommerce regenerates thumbnails across 1,000+ theme variations. BigCommerce re-encodes uploads through Akamai regardless of your original compression. Squarespace applies quality-75 compression to everything. Uploading a single set of images across platforms without adjusting dimensions, format, and file size for each one leads to blurry product photos, slow page loads, and rejected listings.
These guides cover the exact image dimensions, file size limits, supported formats, and compression settings for each platform. Each guide includes a step-by-step optimization workflow and solutions for the most common image errors sellers encounter.
Which Guide to Read First
If you sell on a self-hosted WordPress store, start with the WooCommerce guide -- it covers theme-specific sizing, plugin conflicts, and shared hosting upload limits. For hosted ecommerce platforms, the BigCommerce, Squarespace, and PrestaShop guides each address platform-specific CDN behavior and auto-compression settings. Marketplace sellers should check the eBay and TikTok Shop guides for listing photo requirements. For social commerce, the Pinterest and Facebook Catalog guides cover feed algorithm preferences and multi-placement image sizing.