Convert JPG to AVIF
Convert JPG to AVIF for free. Files never leave your device: the conversion runs in your browser, works offline, no upload, no limits.
Drop files here or click to choose
Your files stay on this device. Nothing is uploaded.
JPG (JPEG) is the most compatible photo format. Lossy: each save discards a little detail, so convert once and keep the original. AVIF is the newest web format, smaller than WEBP, but not yet accepted by many apps and printers. This converter turns one into the other directly on your device, so your files are never uploaded anywhere.
How it works
- Drop your JPG files here or click to pick them (many at once is fine).
- Pick AVIF quality (60 is the default and already looks clean; AVIF holds up better than JPG at low numbers).
- Click Convert. Download each AVIF or all of them as a ZIP.
This tool runs entirely in your browser. Your files are never uploaded, so there is no size limit and it works offline once loaded.
About the formats
JPG (JPEG) — the most compatible photo format. Lossy: each save discards a little detail, so convert once and keep the original.
AVIF (AV1 Image File Format) — the newest web format, smaller than WEBP, but not yet accepted by many apps and printers.
Frequently asked questions
Is it really free and private?
Yes. There is no server: your browser does the conversion with open-source code. Your files never leave your computer or phone, which also means there is no file-size limit and it works offline once the page has loaded.
Will I lose quality converting JPG to AVIF?
Re-encoding a JPG always discards a little more detail, but AVIF is efficient enough that quality 60 usually looks identical while cutting the file to a third.
Does it work on iPhone and Android?
Yes, in Safari and Chrome. Very large batches may be limited by your phone's memory; convert in groups if a batch fails.
Is AVIF safe to use on my site?
Every current browser decodes AVIF. Older software and some printers still do not, so keep the JPG if the file also has to be opened outside a browser.
Why is encoding slower than other conversions?
AVIF compression does much more work per image. A few seconds per photo is normal, and it is the price of files half the size of WEBP.