How much smaller than JPG will AVIF be?

It varies by image, but at comparable visual quality AVIF typically lands at a half to a fifth of the JPG's size — and even more on smooth, gradient-heavy photos. Your exact numbers appear on the result screen, and re-trying at a different quality takes seconds.

Is AVIF safe to use on a production site?

Yes. Chrome, Firefox, Safari, and Edge all decode AVIF natively, and it's widely used by major image CDNs. The standard belt-and-braces pattern is a picture element with an AVIF source and a WebP or JPG fallback — you can generate both here in under a minute.

AVIF or WebP for my photos?

AVIF compresses photos harder — meaningfully smaller files at the same quality — while WebP encodes faster and enjoys slightly broader legacy support. A good rule: AVIF for the heavy, high-traffic images; WebP when you need one format that works absolutely everywhere.

Does converting JPG to AVIF lose quality?

AVIF here is a lossy encode, like JPG itself — but a far more efficient one, so at sensible quality settings the conversion is visually transparent while the file shrinks dramatically. If you need pixel-identical output, Pro's lossless mode encodes AVIF with zero loss.

Is JPG to AVIF free on LightBox?

Yes — image-to-AVIF conversion is free: no signup, no watermark, up to 100 MB per file, auto-deleted after about an hour. Pro (a one-time purchase) adds lossless AVIF, AVIF from video frames, batch conversion for whole folders, and a permanent library.

Free online converter

JPG to AVIF — Shrink Photos Without Visibly Losing Quality

Drop media, a ZIP, or PNG frames

.mp4.mov.webm.gif.jpg.png.webp.heic.zip

Files up to 100 MB free · up to 1 GB with Pro

PNG sequence · Pro

To convert a JPG to AVIF, upload the photo, set the quality slider, and download — no account, no watermark, and a file that's typically a fraction of the JPG's size at the same perceived quality. AVIF is built on the AV1 codec and is the strongest mainstream option for photographic content: it holds textures, gradients, and low-light detail at sizes JPG can't approach.

JPG has carried the web's photos for thirty years, and it shows: blocky artifacts around edges, banding in skies, and files that resist shrinking without visible damage. AVIF's encoder is simply a generation smarter — it spends bits where your eyes look and saves them where they don't. Product photos, hero images, and photography portfolios see the biggest wins, and those are exactly the images dragging most Largest Contentful Paint scores.

All current major browsers display AVIF natively. Convert your heaviest JPGs first — the top-of-page hero image is usually worth more than every icon on the site combined.

Built for photographs

AVIF's strength is exactly where JPG is weakest: fine texture, smooth gradients, and dim scenes. At an equal file size AVIF simply looks better; at equal quality it's dramatically smaller. For product shots and hero images, it's the closest thing to free page speed.

No new artifacts on old photos

Re-saving a JPG as another JPG compounds its artifacts. Converting to AVIF re-encodes with a cleaner model — blocking and ringing don't stack the same way, and banding-prone areas like skies usually come out smoother than the source at a fraction of the weight.

One slider, instant re-exports

Quality is a single 0–100 slider mapped to the encoder's constant-quality mode. Not sure where to land? Convert at two settings and compare — each pass takes seconds, and the result screen shows the exact before/after sizes so the decision makes itself.

Free forever. Pro when you need more.

Everything on this page stays free. Pro adds this — once, no subscription, ever:

1 GB uploads, no daily limit
Batch convert + saved presets
Permanent library, priority processing

$54$2750% off

Launch price · once · yours for life14-day money-back guaranteeSee everything Pro adds

Frequently asked questions

More conversions

WebP to JPG WebP to PNG HEIC to JPG HEIC to PNG WebP to GIF