uDocumentViewer
Convert.heic · .heif

Convert HEIC to AVIF online

100% localFiles never leave your device — no upload, no account, no tracking.
About HEIC to AVIF

Convert HEIC and HEIF photos — the format iPhones capture by default — into AVIF, the AV1-based format that produces some of the smallest files at a given quality. We decode the image with libheif compiled to WebAssembly, then re-encode it as an AVIF at the quality you choose.

No upload, no account, no app install. Your photos are decoded and converted entirely in your browser, so personal pictures never leave your device.

How it works
  1. 01

    Add a HEIC photo

    Drop your HEIC or HEIF file onto the page or pick it from your device.

  2. 02

    Set quality

    Choose the AVIF quality level to balance size and detail.

  3. 03

    Convert

    Click Convert to decode the HEIC and write an AVIF locally.

  4. 04

    Download

    Save the AVIF photo.

Features
iPhone photossmallest filesadjustable quality
Frequently asked
How does the HEIC to AVIF converter work?
Convert HEIC and HEIF photos — the format iPhones capture by default — into AVIF, the AV1-based format that produces some of the smallest files at a given quality. We decode the image with libheif compiled to WebAssembly, then re-encode it as an AVIF at the quality you choose.
Are my files uploaded to a server?
No. Everything runs entirely in your browser using local JavaScript and WebAssembly. Your files never leave your device.
Does it cost anything or require an account?
No. The converter is free, needs no sign-up, and runs locally in your browser.
Related converters
Open these files in a viewer