Convert PNG to AVIF
Converting PNG to AVIF here takes one drop and one click: the page is preset for this exact pair, so add your PNG and hit Convert to AVIF. The AV1 encoder runs as WebAssembly on your own machine, meaning the image is never uploaded.
Drop your PNG here
It becomes a AVIF right in your browser, up to 100 MB
Your file never leaves your device
Why convert PNG to AVIF?
AVIF is where you go for maximum compression. If WebP halves a heavy PNG, AVIF frequently halves the WebP again at comparable visual quality, which is why image-heavy sites and performance-obsessed developers are migrating to it. Alpha transparency survives, so it covers the classic PNG use cases too. The catch is reach: browsers are fine (Chrome, Firefox, Edge and Safari 16+), but desktop tooling, older Android apps and most upload forms are not, so AVIF is best treated as a delivery format for the web rather than a working format.
What is PNG?
PNG (Portable Network Graphics) is a lossless image format from 1996. It compresses with DEFLATE, keeps every pixel exactly as authored, and supports a full 8-bit alpha channel for transparency. That makes it the default choice for screenshots, UI mockups, logos and anything with sharp edges or text. The tradeoff is size: photographs stored as PNG are often several times larger than a visually identical lossy file.
What is AVIF?
AVIF (AV1 Image File Format) is the newest mainstream image format, published by the Alliance for Open Media in 2019 on top of the royalty-free AV1 codec. It delivers the strongest compression of any widely deployed format, especially at low and medium quality, and adds an alpha channel, HDR and 10/12-bit color. Browser support landed in Chrome 85, Firefox 93 and Safari 16, but much desktop software still cannot open an .avif file.
Quality and what to expect
Encoding is lossy at sane defaults: output is built for serving, not archival. Keep the PNG original as your master copy. AVIF handles smooth gradients exceptionally well, with far less banding than JPG at similar sizes, while extremely fine textures may smooth over slightly. The alpha channel is retained. Expect the encode itself to take noticeably longer than a WebP or JPG encode; AV1 buys its small files with CPU time, and large PNGs can take a number of seconds.
PNG to AVIF FAQ
Why is AVIF encoding slower than other formats here?
AV1 compression does dramatically more work searching for redundancy than the JPEG or WebP codecs do. That work is the source of the small file sizes, and on big images it can take several seconds of pure CPU time in the worker.
Does AVIF support transparency like PNG does?
Yes, AVIF carries a full alpha channel and this conversion keeps it. Semi-transparent pixels, drop shadows and feathered edges all survive.
Where will an AVIF file fail to open?
Anything that is not a current browser is suspect: older image viewers, office software, many photo upload forms and Safari before version 16. Serve AVIF on the web with a fallback, and do not send it to someone expecting a regular photo file.
Is this conversion done on a server farm?
No, and that is the point of this site. The rav1e-based encoder is compiled to WebAssembly and executes inside your browser tab. Your PNG never leaves your device.