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convertexa

HEIC → AVIF

HEIC to AVIF converter

convertexa converts HEIC files to AVIF locally in your browser using a dedicated image-heic engine. Nothing is uploaded: the file is read, converted and handed straight back to you as a download.

  • Free, no sign-up
  • Nothing is uploaded
  • Works offline
Quality
Re-encoded
Runs
In your browser
Max input
40 MB
Status
stable

Drop a file to convert

Everything happens on your device — nothing is uploaded.

or paste with Ctrl+V

How to convert HEIC to AVIF

  1. 1 Drop your HEIC photo here.
  2. 2 Pick the output format and adjust quality if needed.
  3. 3 Convert and download the result.

About HEIC and AVIF

HEIC keeps its original colour profile and 10-bit depth; the output is re-encoded, so it is not bit-identical.

AVIF gives the smallest files but encoding is slower than WebP or JPEG.

HEIC files are read by the convertexa engine that ships with this page, so the conversion is identical whether you use this tool or the general converter. The output is produced with the same codec settings for every visitor, which means the same input always produces the same result.

Limitations

  • HEIC is decoded with libheif; multi-frame HEIF sequences use the first image.
  • AVIF encoding is noticeably slower than JPEG or WebP.

Frequently asked questions

How do I convert a HEIC file to AVIF?

Add your HEIC file to the box above. convertexa detects the format from the file content, applies the HEIC to AVIF conversion and gives you the result to download. The whole operation runs inside your browser.

Are my HEIC files uploaded anywhere?

No. The conversion runs in a sandboxed worker on your own device. Your file never leaves the browser, and nothing is stored on a server.

Is the HEIC to AVIF conversion lossless?

No. AVIF is a re-encoded format, so some data is discarded to reach the target format. HEIC keeps its original colour profile and 10-bit depth; the output is re-encoded, so it is not bit-identical.

Is there a size limit?

For reliable results keep the input under 40 MB. Very large files run out of memory in the browser rather than failing quietly.

Which browsers are supported?

Any current version of Chrome, Edge, Firefox or Safari on a desktop. The conversion engines need WebAssembly and Web Workers, both of which are standard since 2018.