JPG to AVIF Converter: Free & Private
You want maximum compression from photos you already have. Convert it here, in your browser, with nothing uploaded anywhere.
Why convert JPG to AVIF?
AVIF extracts more from an existing JPG than any other target format, and it is unusually good at the things JPG is worst at, smooth gradients, low-light noise, and large areas of near-flat colour where JPG produces visible blocking and banding. For photo-heavy pages the byte saving over JPG is often close to half.
The catch worth knowing about
AVIF is not a repair tool. Blocking artefacts already present in the JPG are real pixel data and will be preserved faithfully, sometimes making them slightly more visible because AVIF does not smear them the way another JPG pass would.
One tip before you start
Expect noticeably longer conversion times than WebP. Convert once, serve many times.
JPG vs AVIF, quick comparison
| Property | JPG | AVIF |
|---|---|---|
| Best for | The universal image format. Works on every device, website, and app on earth. Slightly lossy but adjustable quality. | The newest generation format (AV1 image). Best compression of all, but support is still growing. |
| File size | Small and adjustable, the baseline everything else is measured against | About 40% of the JPG size; close to WebP |
| Transparency | No, transparency becomes white | Yes, full 8-bit alpha |
| Where it opens | Universal. Nothing has ever refused a JPG | All current browsers; rare outside them |
How to convert JPG to AVIF
- Drop your JPG files into the box above (or click to browse).
- Press Convert, the encoder loads the first time you use it, then each image takes a moment. It all runs on your device.
- Download each converted file, or grab them all as a ZIP.
Frequently asked questions
Why would I convert JPG to AVIF?
You want maximum compression from photos you already have. AVIF extracts more from an existing JPG than any other target format, and it is unusually good at the things JPG is worst at, smooth gradients, low-light noise, and large areas of near-flat colour where JPG produces visible blocking and banding. For photo-heavy pages the byte saving over JPG is often close to half.
What should I watch out for when converting JPG to AVIF?
AVIF is not a repair tool. Blocking artefacts already present in the JPG are real pixel data and will be preserved faithfully, sometimes making them slightly more visible because AVIF does not smear them the way another JPG pass would.
Any tips for getting the best AVIF out of a JPG file?
Expect noticeably longer conversion times than WebP. Convert once, serve many times.
Will I lose quality converting JPG to AVIF?
AVIF is lossy, and unusually good at it, at the same visual quality it is typically 20-30% smaller than WebP and around half the size of JPG. Gradients and flat skies, where JPG bands most visibly, survive best.
Do my JPG files get uploaded?
No. The conversion runs on your device, in the browser tab you are reading this in. You can prove it: disconnect from the internet and convert anyway.
Is it free, and how many JPG files can I do at once?
Free, with no sign-up, no watermark and no daily limit. Up to 200 files per batch, downloadable individually or as one ZIP.
Related conversions
AVIF is not the only thing a JPG file can become, and JPG is not the only thing that converts to AVIF. These run on the same converter, on your device, with the same 200-file batch limit.
Guides
Longer walk-throughs covering JPG and the way this converter handles it.
Related tools
Once your images are converted, these on-device tools can help you prepare them for sharing or upload.