PNG to AVIF Converter: Free & Private
You need better compression and you need the transparency to survive. Convert it here, in your browser, with nothing uploaded anywhere.
Why convert PNG to AVIF?
AVIF keeps the full alpha channel, so hero cut-outs, illustration overlays and product photography on a transparent background survive intact, and against the PNG you started with, the saving is enormous, because PNG stores photographic tone about as inefficiently as any format still in use. AVIF also handles wide colour and more than 8 bits per channel, so gradients that band visibly in PNG stay smooth.
The catch worth knowing about
AVIF's advantage is smallest on simple flat-colour graphics, where PNG's own compression is already close to optimal and lossless WebP often wins outright. The gap opens up on photographic or heavily shaded artwork. Encoding is also several times slower than WebP, which is worth knowing before you queue up a hundred files.
One tip before you start
Worth comparing both: convert the same PNG to WebP and to AVIF and keep whichever is smaller. Neither costs you anything to try.
PNG vs AVIF, quick comparison
| Property | PNG | AVIF |
|---|---|---|
| Best for | Lossless format with transparency support. Larger files but pixel-perfect, ideal for logos, screenshots and graphics. | The newest generation format (AV1 image). Best compression of all, but support is still growing. |
| File size | Large for photographs, efficient for flat colour | About 40% of the JPG size; close to WebP |
| Transparency | Yes, full 8-bit alpha | Yes, full 8-bit alpha |
| Where it opens | Universal | All current browsers; rare outside them |
How to convert PNG to AVIF
- Drop your PNG 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 PNG to AVIF?
You need better compression and you need the transparency to survive. AVIF keeps the full alpha channel, so hero cut-outs, illustration overlays and product photography on a transparent background survive intact, and against the PNG you started with, the saving is enormous, because PNG stores photographic tone about as inefficiently as any format still in use. AVIF also handles wide colour and more than 8 bits per channel, so gradients that band visibly in PNG stay smooth.
What should I watch out for when converting PNG to AVIF?
AVIF's advantage is smallest on simple flat-colour graphics, where PNG's own compression is already close to optimal and lossless WebP often wins outright. The gap opens up on photographic or heavily shaded artwork. Encoding is also several times slower than WebP, which is worth knowing before you queue up a hundred files.
Any tips for getting the best AVIF out of a PNG file?
Worth comparing both: convert the same PNG to WebP and to AVIF and keep whichever is smaller. Neither costs you anything to try.
Will I lose quality converting PNG 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 PNG 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 PNG 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 PNG file can become, and PNG 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 PNG 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.