WebP
WebP placeholders for quick layout tests
WebP is standard on many sites — but a quick dummy image is often missing. Create WebP at the size you need and embed it by URL.
Check loading and embedding
WebP placeholders let you test lazy loading, srcset, and cache headers without heavy photo files. The URL serves the format directly.
Lock in a fallback
Generate JPG/PNG alongside WebP to check whether picture elements and older browsers fall back to JPG correctly. The format converter helps you switch.
AVIF as well
The same generator can also do AVIF. Useful when you want to compare both formats side by side.
Check the picture tag
Generate the same size as WebP and JPG and test whether your markup picks the right branch — without large photo files.
Quality and file size
Use the quality control to see when the image gets muddy. Helpful when you weigh file size against looks.
FAQ
Do you support AVIF?
Yes, in the same generator. Add AVIF when you roll out that format.
Can I embed WebP by URL?
Yes — a .webp extension and matching parameters are enough.