#image-formats
Practical guides for online sellers: product photos, marketplace listings, video ads and growing your store.
What Is an AVIF File? How to Open It and Convert AVIF to JPG (2026)
AVIF explained for sellers: why downloads save as .avif, how to open them on every device, how to convert to JPG or PNG, and where AVIF is accepted.
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JPG vs WebP vs AVIF: We Tested 33 Product Photos (2026)
An original test on 33 of our own product photos: file sizes and SSIM for JPG, WebP, AVIF and PNG at eleven settings, with the method, limits and what it means for marketplace uploads.
What Is a JFIF File? Why Windows Saves Them and How to Convert to JPG (2026)
What a .jfif file is, why your browser saves images that way, what eBay, Etsy, Amazon, Shopify, Vinted and Poshmark accept, and how to rename or convert to JPG.
How to Convert WebP to JPG (2026): Windows, Mac, Phone and Free Online
Free ways to turn WebP images into JPGs on Windows, Mac, iPhone, Android and the web, how to convert a batch, and when WebP is the better format to keep.
How to Reduce Image File Size (2026): Compress, Resize and Free Tools
Compress versus resize, the quality settings that look identical, which format is smallest, free tools on every device, and the email and marketplace size limits.
How to Convert PNG to JPG (2026): Windows, Mac, Online, and When Not To
Step-by-step PNG to JPG conversion on every device, why transparent backgrounds turn white or black, typical file size savings, and when PNG is the better choice.
How to Convert HEIC to JPG (2026): iPhone, Mac, Windows and Free Online
Every free way to turn iPhone HEIC photos into JPGs on iPhone, Mac, Windows and the web, how to convert a batch, and how to make your camera shoot JPG.
JPG vs PNG vs WebP for Product Images: Which Format to Use Where
How JPG, PNG and WebP compare for product photos, which formats each marketplace accepts, color profiles, compression targets, and what to export for every use.
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