JPG to AVIF — Convert in Your Browser

Why convert JPG to AVIF?

If you have already squeezed everything you can out of JPG, AVIF is the next real step. It routinely halves the bytes at the same perceived quality, which is the kind of gain that moves a Largest Contentful Paint score, not just a file listing.

JPG is the photographic workhorse of the web: a lossy format from 1992 that trades invisible detail for dramatically smaller files. Practically every camera, printer and upload form accepts it.

When JPG → AVIF is the right move

Chasing Core Web Vitals improvements on an image-heavy site.
Cutting CDN bandwidth costs across a large photo catalogue.
Serving high-resolution photography to mobile users on slow connections.

Quality, size and what changes

Expect roughly 40–60% smaller files than the source JPG with no visible loss. Encoding is heavier than JPG, so large batches take longer. Serve AVIF through a <picture> element with a JPG fallback for very old clients.

What you gain with AVIF: Best-in-class compression, wide colour and HDR support, transparency included.

How it works

Drop your JPG file above and Morphio decodes it locally, then re-encodes it as AVIF using WebAssembly + the browser's native codecs. Nothing is ever uploaded — your files stay on your device. Batch as many files as your machine can handle. See exactly how in-browser conversion works.

JPG to AVIF — frequently asked questions

How do I convert JPG to AVIF without uploading the file?

Open the JPG to AVIF page, drop your image on the drop zone and press convert. Morphio runs an in-browser image pipeline built on Canvas and WebAssembly codecs, so the JPG data never leaves your device and no server ever receives a copy.

Does converting JPG to AVIF lose quality?

Colour profile and pixel dimensions are preserved; you choose the quality level before the file is written. Converting JPG to AVIF only rewrites the container and encoding you asked for — the source file on your disk is never modified.

Is the JPG to AVIF converter free, and how big can the file be?

Yes. The free plan covers 10 conversions a day with files up to 200 MB and adds no watermark or sign-up. Morphio Pro ($5/month, or $29 once for lifetime access) removes the daily cap and raises the per-file limit to 5 GB.

Which browsers support AVIF?

Chrome, Edge, Firefox, Opera and Safari 16 and newer all decode AVIF. Older Safari and legacy browsers need a fallback.

AVIF or WebP?

AVIF compresses better; WebP encodes faster and has slightly broader support. Many sites ship AVIF first with WebP behind it.

JPG to AVIF Converter

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