Convert HEIC to AVIF
HEIC is Apple's high efficiency photo format used by iPhones and iPads. Many apps cannot open it directly. Converting to AVIF is a size decision: AVIF reaches a comparable picture in a smaller file, which is why modern sites serve it. Worth knowing before you start: HEIC is already lossy, and encoding to AVIF compresses the image a second time, so the result can only lose detail, never regain it. The conversion runs entirely in your browser: there is no upload, no file size limit and no watermark on the result.
Drop your HEIC files below and download AVIF in seconds. Free, unlimited and completely private: the conversion runs inside your browser, so your files never leave your device and are never uploaded to a server.
No upload. Works with your network switched off. Check it yourself, or read what actually happens to your file.
Why convert HEIC to AVIF?
Apple made HEIC the default camera format on iPhone because it stores photos at roughly half the size of JPG. Outside the Apple ecosystem support is poor: Windows needs paid extensions and many websites reject HEIC uploads, making it one of the most converted formats on the web.
AVIF is based on the AV1 video codec and reaches even smaller files than WebP at the same visual quality. All modern browsers can display it, but many image editors and older tools cannot open it yet, which is the main reason people convert AVIF to an older format.
HEIC vs AVIF at a glance
| HEIC | AVIF | |
|---|---|---|
| Full name | High Efficiency Image Container | AV1 Image File Format |
| Compression | Lossy (HEVC) | Lossy or lossless |
| Transparency | No | Yes |
| Best for | iPhone and iPad photos | Next generation web images |
What changes when you convert HEIC to AVIF
| What happens | |
|---|---|
| Image quality | Reduced. HEIC is already lossy and AVIF compresses again, so this is a second encode. Nothing is recovered, and at low quality settings the losses stack. |
| Transparency | HEIC has no alpha channel, so there is no transparency to lose. |
| EXIF and GPS | Removed. The conversion goes through a pixel buffer, so camera data and location are not carried into the AVIF file. |
| Colour profile | Not carried across. The image is handled in sRGB, which is right for the web and wrong for colour-managed print work. |
| Animation | Not applicable. HEIC files here are single images. |
| File size | Smaller in almost every case, which is the reason for the conversion. How much smaller depends on the picture, so no figure is quoted here. |
How to convert HEIC to AVIF
- Drop one or more HEIC files into the box above, or click to browse.
- ImageConvert converts each file to AVIF right on your device.
- Download a single file, or grab everything at once as a zip.
Frequently asked questions
What is a HEIC file?
HEIC is Apple's high efficiency photo format used by iPhones and iPads. Many apps cannot open it directly.
What is an AVIF file?
AVIF is a next generation format with excellent compression, increasingly used on modern websites.
Is it free to convert HEIC to AVIF?
Yes. There are no limits, no watermarks and no account needed. Convert as many HEIC files as you like.
Are my files private?
Completely. Your HEIC files never leave your browser and are never uploaded to a server, so your images stay on your device.