Convert
PNG to AVIF Converter
Convert PNG to AVIF to get dramatically smaller files for websites while keeping transparency. It runs in your browser and nothing is uploaded.
Your images never leave your device
How to use PNG to AVIF
- Drop your PNG files on the page or pick them from your device.
- Wait while each file is converted to AVIF. AVIF encoding is slow, and large photos can take several seconds.
- Download the AVIF files one by one, or all together as a zip.
Frequently asked questions
Why is AVIF encoding slower than other formats?
AVIF searches much harder for the smallest way to represent the image, and that computation happens on your device. Large photos can take several seconds each, whereas JPG and WebP finish almost instantly.
Does PNG to AVIF preserve transparency?
Yes. AVIF has an alpha channel, so transparent regions and soft edges carry over.
Should I pick AVIF or WebP for my website?
AVIF gives smaller files, WebP is faster to produce and more widely supported by tools. Many sites serve AVIF first with a WebP or JPG fallback for browsers that cannot display it.
Are my PNG files uploaded anywhere?
No. The conversion runs in your browser using WebAssembly, so your PNG files stay on your device. There is no signup, no watermark and no cost, and you can convert a whole batch and download it as a zip.
About PNG to AVIF
AVIF squeezes images harder than any other format widely available in browsers. For a photographic PNG the saving can be an order of magnitude, and unlike JPG, AVIF keeps transparency, so cut-outs and logos remain see-through. If you are tuning a site for Core Web Vitals and your heaviest assets are PNG, this conversion often delivers the biggest single reduction in page weight.
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AVIF encoding is slow, and a large PNG can take several seconds on its own, so expect a batch to take a while. The compression is lossy for photographs, so very fine detail and small text should be checked at full size. Metadata is removed. AVIF displays in current Chrome, Edge, Firefox and Safari, but email programs, print services, social platforms and many editors may refuse it, so keep the PNG, or offer a WebP fallback, for anywhere that is not a modern browser.
PNG is lossless, so no detail is ever discarded; AVIF is lossy or lossless, compressed with AV1. Both formats can store transparency, so transparent areas in the PNG file stay transparent. For scale, a 12-megapixel photo is typically 15 to 25 MB as PNG and 1 to 2.5 MB as AVIF. Compatibility: Recent versions of Chrome, Edge, Firefox and Safari display it. Support in editors, email clients and upload forms is still patchy.