Convert WebP to AVIF on Mac
Select the WebP files in Finder, press ⌥ F, choose AVIF and press Return. FileFlip saves each AVIF next to its original and works without an internet connection.
How to convert WebP to AVIF with FileFlip
Select the WebP files
In Finder or on the Desktop. One file, or a whole folder with ⌘ A.
Press ⌥ F
FileFlip opens next to the selection and lists the formats it can make from WebP. Type “AVIF” to jump to it.
Choose AVIF and press Return
The AVIF files appear next to the originals. To make them smaller first, press ⇥ and lower the quality or size.
WebP and AVIF
Images saved from websites are often WebP, which many apps, upload forms and older systems still don’t accept. AVIF makes some of the smallest image files available, which is ideal for websites.
What changes when you convert
- AVIF can store the image either lossy or lossless.
| Property | WebP | AVIF |
|---|---|---|
| Made by | Alliance for Open Media | |
| Introduced | 2010 | 2019 |
| Compression | Lossy or lossless | Lossy or lossless (AV1) |
| Transparency | Yes | Yes |
| Animation | Yes | Yes |
| Best for | Images on websites | Small, high-quality images on the web |
| Opens in | All current browsers; macOS 11 and later; some older apps can’t open it | Current versions of Chrome, Firefox and Safari; macOS 13 and later; many apps can’t open it yet |
| File extension | .webp | .avif |
| In FileFlip | Opens | Opens and saves |
Other ways on a Mac
For one file now and then you may not need FileFlip. These work with what’s already on your Mac.
Terminal
The sips command converts images in place or into a new file.
sips -s format avif image.webp \
--out image.avifBuilt into macOS and good for scripts. Run sips --formats to see what your macOS version can read and write.
Questions about WebP and AVIF
Does converting WebP to AVIF lose quality?
AVIF can store the image either lossy or lossless.
Can I convert many WebP files at once?
Yes. Select them all in Finder, press ⌥ F and choose AVIF. Progress moves to the menu bar, so you can close the panel and keep working.
Where is the AVIF file saved?
Next to the original, with the same name and the .avif extension. The WebP file isn’t changed. In Settings you can choose a different folder instead.
Can I convert AVIF back to WebP?
No. FileFlip opens WebP files but doesn’t save them.
Are my files uploaded anywhere?
No. FileFlip converts files on your Mac and works with the internet turned off.
Convert a whole folder of images at once
FileFlip also handles video, audio, PDFs, documents and data files. Requires macOS 14 Sonoma or later.
Coming soon for Mac