Convert HEIF images to AVIF online for free. Upload one file or many, choose the quality and maximum size, then download the AVIF results one by one or all together in a ZIP. No sign-up needed.
HEIF is the container standard behind HEIC. It can hold one or many images with efficient compression, but support outside Apple devices and recent software is patchy, so it is usually converted to JPG or PNG.
More HEIF conversionsAVIF is a modern image format built on the AV1 video codec. It supports transparency and high dynamic range, and it often produces the smallest files of any web image format at a given quality. Encoding is slower than for JPG or WebP, and older browsers and some apps cannot open it.
More AVIF conversions| Feature | AVIF |
|---|---|
| Full name | AV1 Image File Format |
| Compression | Lossy and lossless |
| Transparency | Yes |
| Animation | Yes |
| Introduced | 2019 |
| Developed by | Alliance for Open Media |
| Best for | The smallest web images in modern browsers |
Click Select File or drop your HEIF file onto the upload box. Pick the quality and maximum size, and the converted AVIF appears in the list below with a download button. You can add many files at once and download them together as a ZIP.
Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.
Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.
For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.