Convert HEIC to AVIF
AVIF produces the smallest files of any mainstream format — often smaller than HEIC itself at the same excellent quality. Converting iPhone photos to AVIF is ideal for web publishing and storage; the whole process runs in your browser, so your photos are never uploaded.
Free · No signup · No upload — runs 100% in your browser
How to convert HEIC to AVIF
- Open the converter and add your HEIC files — drag & drop, paste from the clipboard, or pick a whole folder.
- Choose AVIF as the output format in the options panel and press Apply.
- Fine-tune quality or resize if you need to — files re-encode instantly.
- Download results individually, as a ZIP, or combined into a PDF.
About the formats
HEIC
HEIC (High Efficiency Image Container, also seen as HEIF) is the format iPhones and iPads use for photos by default. It stores excellent quality at roughly half the size of JPEG, but support outside the Apple ecosystem is poor — many Windows apps, websites, and upload forms simply reject it.
AVIF
AVIF is the newest mainstream image format, built on the AV1 video codec. It produces the smallest files of any widely supported format — often half the size of JPEG at the same quality — with transparency and HDR support. Encoding is slower, but the savings are significant.
Frequently asked questions
Are my HEIC files uploaded to a server?
No. The conversion runs entirely in your browser using WebAssembly codecs — your files never leave your device. After the first visit the converter even works offline.
Can I convert many files at once?
Yes — add as many files (or whole folders) as you like, convert them in one batch, and download everything as a single ZIP. There are no file-count or size limits.
Will I lose quality converting HEIC to AVIF?
You stay in control: AVIF quality is adjustable in the options panel, and the defaults are tuned to be visually indistinguishable for typical images. You can re-convert with different settings instantly.
Is AVIF supported everywhere?
Every major modern browser (Chrome, Safari, Firefox, Edge) supports AVIF. For sharing photos you just need to open on any device, JPG remains the safest choice — AVIF shines for web publishing and storage pipelines.