How to Convert PNG to AVIF
PNG is lossless and universally supported, which is exactly why it is so heavy. A single full-page screenshot can easily exceed a megabyte, and a site full of PNG graphics is a site that loads slowly. AVIF is the most efficient image format currently available — the same image, visually identical, typically lands at a fraction of the size, with transparency fully intact. This converter runs entirely inside your browser, so nothing is uploaded.
Upload your PNGs
Drop one image or a whole batch. Everything is encoded locally on your device - nothing is sent to a server.
Set the quality
60% is visually excellent for almost every image. Push higher for photography, lower when file size is the priority.
Download your AVIFs
See exactly how much smaller each file became, then download individually or as a single ZIP archive.
Why AVIF Is the Most Efficient Image Format
AVIF is built on AV1, a modern video codec developed by the Alliance for Open Media — a consortium including Google, Netflix, Amazon and Mozilla. Video codecs have decades of compression research behind them that still image formats never benefited from, and AVIF inherits all of it.
In practice the results are dramatic. An AVIF file is routinely thirty to fifty percent smaller than the equivalent WebP, and half the size of a comparable JPG — while carrying full transparency support, wide colour gamut and high dynamic range, none of which JPG can do at all. Against PNG, the savings on photographic content are frequently in the seventy to ninety percent range.
The trade-off is reach. Every current major browser now decodes AVIF, but older devices and plenty of desktop software still do not. For a website served to modern browsers, AVIF is simply the best choice available and materially improves Core Web Vitals. For a file you need to email, print or edit, our WebP converter is the safer middle ground.
AVIF vs WebP vs PNG
| Format | Typical Size | Transparency | Best For |
|---|---|---|---|
| AVIF | Smallest | Full alpha | Modern websites, maximum performance |
| WebP | Small | Full alpha | Web use where broader support still matters |
| PNG | Largest | Full alpha | Editing, archival, guaranteed compatibility |
Frequently Asked Questions
How much smaller is AVIF than PNG?
For photographic content, typically seventy to ninety percent smaller. For flat graphics and simple logos the saving is more modest, since PNG already compresses those efficiently. The tool shows your exact savings for each file.
Does AVIF support transparency?
Yes, fully. AVIF supports a complete alpha channel just like PNG, so transparent backgrounds, soft edges and semi-transparent overlays are all preserved exactly.
Which browsers support AVIF?
Chrome, Edge, Firefox and Safari all decode AVIF in their current versions. Encoding AVIF - which is what this tool does - needs Chrome 106+, Edge 121+ or Firefox 128+. The page tells you if your browser cannot do it.
Should I use AVIF or WebP?
AVIF is meaningfully smaller and is the better choice for a modern website. WebP has broader support in older software and is the safer pick if the file needs to work outside a browser.
What quality setting should I use?
Around 60% is visually excellent for the vast majority of images - AVIF holds up remarkably well at settings that would visibly damage a JPG. Push higher only for detailed photography.
Is AVIF lossless like PNG?
This tool encodes lossy AVIF, which is what produces the dramatic size savings. The result is visually indistinguishable at sensible quality settings, but it is not a bit-for-bit copy - keep your PNG if you need a true lossless master.
Is it safe to convert private images here?
Yes. Encoding happens entirely inside your browser - your images are never uploaded to any server, never stored, and never seen by anyone.
Can I convert multiple PNGs at once?
Yes. Drop as many as you like - each converts separately, and Download All as ZIP bundles the whole batch into one archive.
Will AVIF improve my website speed?
Substantially, if images are a large part of your page weight - which they usually are. Smaller images mean faster loading, better Core Web Vitals, and a measurable ranking benefit.
How do I convert AVIF back to PNG?
Use our AVIF to PNG converter, which decodes AVIF to lossless PNG with transparency preserved, ready for editing in any software.
Why did my file barely get smaller?
Simple graphics with few colours - flat icons, basic logos - are already compressed very efficiently by PNG, so there is little left for AVIF to gain. Photographic content is where AVIF shines.
Is this PNG to AVIF converter really free?
Completely free, with no limits, no watermarks, no signup and no premium wall. Everything runs in your browser, so there are no server costs to pass on.
Last updated: July 11, 2026 · FlipMyFormat PNG to AVIF Converter
Written and maintained by the FlipMyFormat team