Convert JPG to AVIF
Re-encoding JPGs as AVIF roughly halves photo file sizes at the same perceived quality — the largest single saving you can get without shrinking the image. For galleries, blogs, and shops where photos dominate page weight, it's the highest-leverage conversion on this site.
Open converterHow to convert JPG to AVIF
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Open your highest-quality JPG
This is generational compression — lossy on top of lossy — so feed the encoder the cleanest original you have, not a copy that's been re-saved before.
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Keep the slider moderate
AVIF quality numbers run lower than JPG's for the same look; somewhere in the 60–80 band usually halves the file with no visible change.
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Wait out the encode, then download
The WebAssembly AV1 encoder takes a moment per photo. Click Convert & download when it finishes, and archive the JPG as your master.
Why convert JPG to AVIF?
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Photos commonly come out around 50% smaller than the JPG at matching visual quality.
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AVIF handles smooth gradients — skies, skin, studio backdrops — with visibly less banding than JPG at low bitrates.
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All four major browsers now decode AVIF natively, so the files are safe to publish.
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Halving image weight is the cheapest page-speed upgrade an image-heavy site can make.
What actually happens to your file
Your JPG was already lossy, and AVIF encoding is lossy again, so this is generational compression — the reason it still works out is that AVIF is so much more efficient that it can preserve the JPG's visible quality in half the bytes. Convert from the best original you have, keep the quality slider in the 60–80 range (AVIF quality numbers run lower than JPG's for the same look), and expect the encode to take a moment: the WebAssembly AV1 encoder trades seconds for bytes. Keep the JPG as your archive master.
Frequently asked questions
How much smaller will my JPG get as AVIF?
Typically 40–60% smaller at the same visual quality, sometimes more for smooth, low-detail images. The live preview shows the exact output size, so you're never guessing.
Is it bad to convert one lossy format to another?
It costs a small amount of fidelity, yes. Encode once, from the highest-quality source you have, at a sensible quality setting, and the second generation is effectively invisible. What you shouldn't do is bounce images back and forth repeatedly.
Who can't open an AVIF file?
Current browsers all can. The gaps are elsewhere: older desktop editors, some phone gallery apps, and strict upload forms. Publish AVIF on the web; hand people JPG.