Is the HEIC to AVIF converter free?

Yes. Transcodr is free with no accounts, watermarks, or hard limits beyond your device's available memory.

Are my files uploaded to a server?

No. The conversion runs locally via ffmpeg compiled to WebAssembly, so your HEIC file never leaves the browser tab.

Is transparency preserved?

Yes — AVIF supports an alpha channel, so transparent areas in your HEIC stay transparent.

How do I convert HEIC to AVIF?

Drop your HEIC file above (or click Browse) — the output is already preset to AVIF — then click Convert and download the result.

HEIC → AVIF · On-device · No upload

Convert HEIC to AVIF

Convert HEIC to AVIF in seconds, free and entirely in your browser. HEIC is Apple's high-efficiency image format from iPhone cameras; AVIF is the AV1-based image format with excellent compression. Transcodr runs real ffmpeg compiled to WebAssembly, so your file is processed on your own device and never uploaded.

Drop files to convert

Video, audio, images, subtitles: anything ffmpeg can read. Drop them anywhere on the page or browse from disk.

Try a sample:

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Time	From		To	Size	Δ	Duration
When you convert something, it’ll appear here. Clears on tab close — we don’t keep records.

HEIC vs AVIF

Property	HEIC	AVIF
Compression	Lossy	Lossy or lossless
Transparency	Yes	Yes
Compatibility	Apple devices	Modern browsers

HEIC → AVIF questions

Is the HEIC to AVIF converter free?: Yes. Transcodr is free with no accounts, watermarks, or hard limits beyond your device's available memory.
Are my files uploaded to a server?: No. The conversion runs locally via ffmpeg compiled to WebAssembly, so your HEIC file never leaves the browser tab.
Is transparency preserved?: Yes — AVIF supports an alpha channel, so transparent areas in your HEIC stay transparent.
How do I convert HEIC to AVIF?: Drop your HEIC file above (or click Browse) — the output is already preset to AVIF — then click Convert and download the result.

01 / Engine

Real ffmpeg, compiled to WebAssembly.

Same library Netflix, YouTube, and basically every command-line video tool relies on, running in a Web Worker. Pipe a file in, run a command, pipe bytes back out.

02 / Privacy

Nothing leaves the tab.

No uploads, no accounts, no telemetry beyond an anonymous pageview. We couldn’t see your files if we wanted to — there’s no server in the loop.

03 / Limits

It is, after all, a tab.

Files up to a few hundred megabytes convert comfortably. Beyond that, your browser starts asking pointed questions. Use the desktop ffmpeg for 4K masters.

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