WebP, AVIF, JPG or PNG: which format should you use?

JPEG compresses photographs well, but it does not support transparency or animation. PNG preserves pixels and alpha precisely, but photographic files are often large.

WebP combines lossy or lossless compression, transparency, and animation. AVIF adds modern compression, high bit depth, and HDR, but encoding may be slower and older tools are less predictable.

JPG remains a safe output for email, forms, printers, and general software. WebP or AVIF make more sense when a website controls how the image is delivered.

Do not compare two formats using the same quality number alone. A value of 80 does not mean the same thing across encoders. Compare visual results and file size at identical dimensions.

A safe vector logo should remain SVG when the destination accepts it. It keeps edges sharp at any size. For raster graphics with transparency, PNG is the most predictable choice.

WebP can reduce a screenshot or illustration, but inspect small text, one-pixel lines, and flat colors. Strong lossy compression creates smearing there before a photograph looks obviously degraded.

Serve dimensions that match the component. An AVIF that is twice as wide as needed can outweigh a correctly sized WebP. A modern format does not replace resizing or responsive images.

When the audience or technical environment is uncertain, provide a picture fallback or retain a JPG or PNG version. Measure the produced bytes and display behavior instead of assuming the newest format always wins.

Identify destination, transparency, animation, and display size first. Export two candidates at the same dimensions, then compare important details and measured size.

Keep a high-quality original. Optimized files are delivery derivatives, not master archives. This lets you make a different format later without starting from an already degraded copy.