The AV1-based successor to WebP — smaller files than either JPEG or WebP, but the newest format your phone or browser is likely to encounter.
AVIF (AV1 Image File Format) packages a still frame of the AV1 video codec inside a still-image container, which is why it compresses noticeably tighter than JPEG and often tighter than WebP at the same visual quality. Netflix, YouTube thumbnails, and a growing number of publishers use AVIF for exactly that reason: less bandwidth per image at scale. Like WebP, an AVIF file can carry transparency and can be lossless, and Apple added native AVIF decoding to iOS and macOS, so Safari and Photos open it without any extra software. The catch is that AVIF is newer than WebP, which means the compatibility gap is wider: many Windows installs, older Android phones, most desktop image editors, and a long list of upload forms still cannot open it at all, and some show nothing but a gray box. Photographers and iPhone users are as likely to encounter AVIF from a downloaded web image as to produce one on purpose, and converting it to JPEG remains the reliable way to make that file open anywhere.
iPhone, iPad, and Mac (recent versions) open AVIF natively in Photos, Preview, and Safari. Chrome, Firefox, and Edge display it in-browser on any platform. Most of Windows outside the browser, many Android phones released before 2021, and the majority of desktop photo editors do not support it yet.
AVIF's compression advantage does not help once an app, printer, or older device cannot decode the format at all. Converting on-device turns a downloaded AVIF image into a JPEG or PNG without sending it to a web-based converter first.
Filemorph can convert AVIF to JPG on-device — reliable compatibility with editors, printers, and forms that have not added AVIF support.
Filemorph converts .avif files entirely on-device on iPhone, iPad and Mac — no upload, no account, and it works in Airplane Mode.
Relevant operations in Filemorph:
For file size, usually — AVIF's AV1-based compression tends to produce smaller files than WebP at matching quality. For compatibility, WebP has the edge, since it has been around longer and more software recognizes it.
AVIF support rolled out later than most image formats, so many desktop photo editors, some Windows installs, and older Android devices still cannot decode it. Converting to JPEG or PNG sidesteps the problem entirely.
No. Filemorph decodes and re-encodes AVIF entirely on the iPhone, iPad, or Mac it's running on, so the image never leaves the device, and the conversion works in Airplane Mode.