Convert PNG to AVIF
Keep the transparency, lose most of the file size.
- Private by defaultDeleted within an hour
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How it works
Add your images
Drag and drop, paste, or pick files. They upload over an encrypted connection.
Pick a quality or a target size
Use the quality slider, or tell it exactly how many KB or MB you need.
Download
Save each file, or grab them all at once as a ZIP.
PNG files are large because they store every pixel exactly. AVIF can describe the same picture in a fraction of the space and, unlike JPEG, it keeps an alpha channel, so logos, cut-outs and interface graphics stay transparent after conversion. That combination makes AVIF a strong replacement for PNG on web pages.
By default the conversion is lossy: very fine detail is approximated to save space. For photos and product cut-outs that is rarely visible. For pixel-precise artwork such as small icons, sharp text or pixel art, switch the editor to Lossless mode, which keeps every pixel and still usually beats PNG on size.
Soft transparent edges, such as hair in a cut-out or a drop shadow, are preserved rather than hardened. Because AVIF is still unsupported in a number of desktop editors and upload forms, keep the PNG as your working file and use the AVIF for delivery. Your image is uploaded over an encrypted connection, processed on our own servers and removed within one hour. Up to twenty files can be converted at once without an account.
Why AVIF treats screenshots better than other lossy formats
JPEG and lossy WebP save space by storing colour at half the resolution of brightness. Photographs hide that well. Interface graphics do not: a thin red underline or small blue link text loses saturation and gains a soft edge. The AVIF files made here keep colour at full resolution, so coloured text and fine lines hold their sharpness even in lossy mode. Add the way AVIF handles large flat areas, at almost no cost in bytes, and it becomes the first lossy format that can take over screenshots, charts and interface mock-ups from PNG.
Lossless AVIF, lossless WebP and PNG compared
For exact reproduction you have three candidates. PNG is the baseline and opens everywhere. Lossless WebP is usually the smallest of the three, by a clear margin on graphics. Lossless AVIF often lands between them, and on some graphics it is no smaller than the PNG; lossy coding is where the format excels.
A sensible routine follows from that. Convert to lossy AVIF at this page's starting quality of 60 and compare at full size. If you cannot see a difference, you have the smallest file by far. If pixel-exactness is required, for instance for pixel art or for images that software will compare, try lossless WebP before lossless AVIF and keep whichever is smaller.
Very small images are a special case
Every AVIF begins with a few hundred bytes of header that describe the picture before any of it is stored. For a photo that overhead is nothing. For a 16 pixel icon that weighs 400 bytes as a PNG it is more than the image itself, and the AVIF comes out larger than what you started with. The editor shows both sizes side by side, so this is easy to catch. Leave tiny icons and one-colour shapes as PNG, or better, as SVG.
Frequently asked questions
Does AVIF keep my transparent background?
Yes. The alpha channel, including soft edges and shadows, is kept.
Can I convert without any quality loss?
Yes. Choose Lossless mode in the editor and every pixel is kept exactly.
Is AVIF good for logos and icons?
Yes, particularly in Lossless mode. For artwork that must scale to any size, SVG remains the better choice.
What if a program cannot open the AVIF?
Keep the PNG as a fallback, or convert to WebP, which is supported by more software.
Does AVIF keep 16-bit colour from my PNG?
The output here is eight bits per channel. A 16-bit PNG is reduced during conversion, which you will not see on screen. Keep the PNG as the master if you plan heavy editing.
Can I use an AVIF as a CSS background?
Yes, in every current browser. The image-set function in CSS lets you list an AVIF with a PNG or WebP fallback, in the same spirit as the picture element in HTML.