WebP to AVIF converter
Convert WebP images to AVIF when you want to push file sizes down further for a modern website.
Convert to
The smallest files, keeps transparency. Takes a little longer to create; newer apps only. AVIF needs WebAssembly, which this browser has turned off.
How did this tool do?
Moving images from WebP to AVIF
If your site already uses WebP, AVIF is the next step down in size. It often shaves a meaningful amount off a WebP at the same visual quality, especially on photographs.
Both formats are lossy, so this re-encodes an already-compressed image, and some detail is lost each time. For the best result, convert from the original JPG or PNG rather than the WebP if you still have it.
Both keep transparency. AVIF takes longer to create and a few older browsers can't show it, so many sites serve AVIF with WebP as a fallback.
Where you'll meet it
Upgrading a WebP site
Try AVIF on your heaviest images and compare the sizes.
When the original is gone
Converting the WebP is the only route if you no longer have the source.
Testing savings
Compare the before and after with the slider to judge it by eye.
All format conversions
How to use it
- 01Drop your images — mixed formats are fine.
- 02Choose what to convert to. For JPG, pick the colour that fills transparent areas.
- 03Tap Convert, compare any file with its original, and download one file or a ZIP.
Converting formats, answered
Is converting WebP to AVIF worth it?
Often, for photographs. Compare the result: if the saving is small, stay with WebP, which is faster to create and slightly more widely supported.
Will quality drop?
A little, because both formats are lossy. Converting from the original source avoids stacking two rounds of compression.
Does transparency survive?
Yes, both WebP and AVIF store transparency.
Are my images uploaded?
No. The conversion runs in your browser, so the files never leave your device and it keeps working with your connection off.