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PNG vs JPEG vs WebP: Which Format for Which Purpose

The three dominant web image formats each have distinct strengths. JPEG uses lossy compression optimized for photographs — natural gradients, skin tones, and complex product textures compress efficiently with minimal visible quality loss. PNG uses lossless compression and supports full transparency, making it the right choice for logos, graphics, screenshots, and any image where exact pixel values matter. WebP is a modern format developed by Google that achieves roughly 25–35% smaller file sizes than JPEG at equivalent quality, and supports transparency like PNG. Browser support for WebP is now near-universal (97%+ as of 2025), but some older marketplace upload systems and image editing tools don't accept WebP, which is why JPEG remains the practical standard for e-commerce listings.

When Each Marketplace Platform Expects Which Format

Amazon accepts JPEG, PNG, TIFF, and GIF but not WebP. eBay accepts JPEG, PNG, GIF, TIFF, BMP, and WebP. Etsy accepts JPEG, PNG, and GIF. Shopify accepts JPEG, PNG, WebP, GIF, and AVIF. Google Shopping accepts JPEG and PNG. Depop accepts JPEG and PNG. The practical takeaway: JPEG is the universal safe format for all marketplace uploads. PNG is appropriate when you need exact white backgrounds (JPEG compression slightly affects white pixel values) or transparency. Convert to JPEG as the final step in your processing workflow — after removal, resize, and compositing are complete — to produce the smallest acceptable file for marketplace upload.

Tips for Best Results

• Convert to JPEG as the last step, not the first — converting early and then editing introduces quality loss at each save.
• Use PNG as your working format during editing; convert to JPEG only for final marketplace upload.
• For Shopify stores where you control the front-end, consider WebP — it significantly improves page load speed.
• When converting from PNG to JPEG, set quality to 85–90 for product photos — this balances file size and visual quality.

When to Use This vs Other Tools

Use this for standalone format conversion. For a complete multi-platform export workflow that converts to the correct format per platform (JPEG for Amazon, WebP option for Shopify, etc.), use the Image Pack Exporter. If you need to reduce file size after conversion, use the Image Compressor.