Why can't I convert JPG to AVIF in my browser?

Web browsers can open many image formats but can only create PNG, JPG and (outside Safari) WebP. AVIF isn't one of them, so online converters secretly upload your files to a server to do it. TinyPresso converts on your Mac instead — nothing is uploaded.

Does converting JPG to AVIF lose quality?

AVIF is a high-efficiency format; TinyPresso converts at high quality, and for photos the result is visually identical while taking less space.

Convert JPG to AVIF

No web browser can create AVIF files, so a truly private “online” JPG-to-AVIF converter doesn't exist. The free TinyPresso app does the conversion on your Mac — offline, in batches, with compression built in.

Web browsers can't create AVIF files — no online tool can truly do this conversion in your browser. The free TinyPresso app converts JPG to AVIF on your Mac, offline: drop your files in, set Format to AVIF, press Compress.

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Why convert JPG to AVIF?

AVIF is the most efficient photo format in wide use — often half the size of a JPG at equal quality — and every modern browser can display it. Great for shrinking a website's image weight.

Good to know

Why no browser tool? Creating AVIF files needs an encoder that no web browser ships. Sites claiming to convert to AVIF “online” upload your files to their server — TinyPresso does it on your Mac instead.
Batches welcome. Drop as many files as you like — there's no limit and no queue.

Need more than a few files?

The free TinyPresso app for macOS converts JPG to AVIF in unlimited batches and compresses the results at the same time — drag a whole folder in, press Compress, done. It runs 100% offline, so client work and personal photos stay on your Mac. It also handles reducing image file size in general.

Related converters

TinyPresso converts and compresses images right on your Mac — free, offline, no limits.

Get TinyPresso for Mac