Website images
Best Image Format for the Web: JPG, PNG, WebP, AVIF or SVG?
There is no single best image format for every website. A photo, a logo, a screenshot, and a vector illustration have different needs. The most useful approach is to choose a format based on the kind of visual content and where it will be displayed.
Photos: JPG, WebP or AVIF
Photographs contain many colors and subtle gradients, so formats designed for photographic compression are usually a better fit than PNG. JPG has maximum compatibility. WebP offers strong modern compression and broad browser support. AVIF can often compress even more efficiently, although compatibility outside modern web stacks can be less predictable.
Logos and illustrations: SVG first
SVG is vector-based, so logos, icons, charts, and simple illustrations can remain sharp at any screen resolution without storing a giant pixel grid. It is often the best website format when the artwork is genuinely vector artwork.
If the destination rejects SVG, rasterize a copy to PNG at the dimensions you actually need rather than replacing the SVG master.
Screenshots and interface graphics
PNG remains a dependable default for screenshots, diagrams, text-heavy graphics, and UI images where crisp edges matter. WebP can reduce file size for delivery, but keep a lossless working copy when the asset may be edited again.
Do not solve format and dimensions separately
A perfectly chosen format can still produce a slow page if you publish an image with far more pixels than the layout displays. Match the image dimensions to the rendered use case, then choose compression and format. File size is the result of all three decisions: dimensions, image content, and encoding.