Images
Turn your HEIC files into AVIF in seconds. Everything happens in your browser: nothing is uploaded to any server.
Drag your files here
Or paste them with Ctrl+V. They never leave your device.
Windows, Android and many websites cannot open it without extra software. As AVIF it takes minimal space with good quality, perfect for the web.
HEIC (HEIF) is the format iPhone and iPad save photos in by default, based on the HEVC codec.
Strengths: It takes roughly half the space of a JPG at the same quality.
Limits: Windows, Android and many websites cannot open it without extra software.
AVIF uses the AV1 video codec to compress images, with transparency and high dynamic range colour.
Strengths: It is usually the smallest at equal quality, often half the size of a JPG.
Limits: Encoding is slow and many desktop apps still cannot open it.
No. The HEIC to AVIF conversion runs entirely in your browser, with code downloaded from this site and executed on your device. You can check it in the Network tab of the developer tools or by going offline after the page loads.
A little: AVIF uses lossy compression. At the default quality the difference is not visible to the naked eye, and you can raise it in the options for maximum quality.
Your device’s memory sets the limit: on desktop, images up to about 100 megapixels; on mobile, up to 16.7. If an image is too large you are told before it starts.
Yes. Drop as many HEIC files as you like: several are converted at the same time, depending on your processor cores, and when they finish you can download each AVIF or all of them in a ZIP.