Understanding Web Image Formats: WebP, AVIF, and Beyond
Stop using heavy PNGs for simple layout backgrounds. Learn which format fits your specific web app performance requirements.
Modern image formats are not interchangeable. WebP is a strong default, AVIF can produce smaller files for photography, and PNG still matters when exact transparency or crisp UI edges are required.
For most websites, the practical workflow is simple: keep a high-quality source, export WebP for broad delivery, use AVIF where your stack supports fallbacks or modern-only delivery, and reserve PNG for images that truly need it.
The format decision should happen after the layout decision. Dimensions, density, and crop usually affect performance more than the file extension alone.
Need to convert an image format?
Try Lumli Convert to turn HEIC, AVIF, PNG, JPG, WebP, SVG code, and other assets into web-ready outputs.
Try Lumli ConvertKeep reading
Related articles
AVIF vs WebP: Which Format Is Better in 2026?
Compare AVIF and WebP for compression, quality, transparency, browser support, encoding speed, and web performance.
Read articleWebP vs PNG: Which Image Format Should You Use?
Compare WebP and PNG for websites, transparency, screenshots, logos, file size, quality, and browser support.
Read articleWhat Is AVIF and When Should You Export Images With It?
A practical guide to using AVIF for smaller modern web images while keeping WebP, JPG, and PNG fallbacks in mind.
Read article