Free online converter
JPG to AVIF — Shrink Photos Without Visibly Losing Quality
MP4, MOV, WebM, GIF, JPG, PNG, WebP, HEIC, ZIP
Up to 100 MB free · 1 GB with Pro
HEIC, animated WebP input, PNG sequences and frame sequence export require 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.
Why convert with LightBox
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.
Convert common formats free. Lifetime Pro adds more capacity and permanent hosting, with no subscription.
| Limit | Free | Lifetime Pro |
|---|---|---|
| File size | 100 MB | 1 GB |
| Per day | 4 files | Unlimited |
| Files kept | 1 hour | Forever |
| Batch | 1 file | 20 files |
| Queue | Standard | Priority |
50% off at launch · Paid once, yours for life. No recurring payments.
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