What this AVIF converter does
This is a two-way AVIF converter that runs entirely in your browser: it turns PNG, JPG and WebP into AVIF, and turns AVIF back into JPG, PNG or WebP, in batches, without uploading anything.
AVIF is built on the AV1 video codec and is currently the most efficient image format a mainstream browser can display. For photographs it routinely beats JPG by 30–50% and PNG by far more, while supporting transparency and wide colour. Every current version of Chrome, Edge, Firefox, Safari and Opera decodes it.
The catch is everything outside the browser. Plenty of desktop software, upload forms and print workflows still do not accept AVIF, which is why converting back matters just as much as converting to. Pick your direction in the tool above — the output format selector controls both.
How to use the AVIF converter
- Drop your images inDrag any mix of PNG, JPG, WebP or AVIF files onto the converter above. Nothing is uploaded.
- Choose your output formatPick AVIF to convert into it, or JPG, PNG or WebP to convert out of it. Adjust quality if you want a smaller or sharper result.
- Download the resultsSave files individually, or export the whole batch as a single ZIP.
AVIF against the alternatives
| AVIF | Older formats | |
|---|---|---|
| File size | Smallest of the four | JPG and PNG are much larger |
| Transparency | Yes | PNG yes, JPG no |
| Browser support | All current browsers | Universal |
| Software support | Still catching up | Excellent |
| Encoding speed | Slower | Faster |
If you want most of the size saving with fewer compatibility questions, WebP sits neatly between AVIF and the older formats.
Nothing you convert leaves this page
Every conversion here happens inside your browser through WebAssembly builds of libavif, MozJPEG, OxiPNG and libwebp. No image is uploaded, so nothing is stored on a server and nothing can leak later. It also means the only limit on batch size is your own machine.
More conversions
Questions
What is AVIF?
AVIF is an image format based on the AV1 video codec. It compresses far more efficiently than JPG or PNG, supports transparency and wide colour, and is decoded by all current mainstream browsers.
Can I convert both to and from AVIF here?
Yes. Drop your files in and pick the output format. PNG, JPG and WebP convert into AVIF; AVIF converts back into JPG, PNG or WebP.
Is AVIF better than WebP?
For file size at a given quality, AVIF is usually ahead, especially on photographs. WebP encodes faster and has slightly broader support in older software, which is why both are still worth having.
Why does AVIF take longer to encode?
It searches much harder for redundancy than older formats do, which is exactly why the files come out smaller. The cost is paid once, at conversion time.
Are my files uploaded?
No. Everything runs in your browser via WebAssembly, so your images never leave your device.