AVIF is AV1 still-picture encoding, alpha, and far smaller files than JPEG at equal quality. PNG is lossless compression with a full 8-bit alpha channel. ImageMagick sits between the two, and this page says exactly what happens to an AVIF file on the way to becoming a PNG one.
What runs when an AVIF file becomes PNG
ImageMagick 6.9.12, on a machine we rent and watch. Your AVIF file is uploaded once, ImageMagick runs once, the PNG comes back, and neither file is kept. AVIF to PNG is one of the 3649 pairs that engine was probed on with a real file, which is why it has a page here and why the pairs the probe could not prove do not.
What survives from the AVIF into the PNG
The pixel dimensions of your AVIF file. The PNG comes out the size the AVIF went in, because nothing on this path resizes anything.
Transparency. AVIF and PNG both carry a real alpha channel, so a cut-out sent as AVIF is still a cut-out as PNG.
What AVIF to PNG costs you
Every frame of the AVIF but the first. AVIF can hold an animation and PNG cannot, so frame one is what comes back. The alternative would be one numbered PNG file per frame and no single answer to hand you.
If a model is going to read the PNG
A PNG file is pixels, and pixels are expensive for a model to read. Handed this PNG, an assistant spends its budget looking at the picture rather than reading it, and it will paraphrase what it thinks it saw. If your AVIF is mostly words, the useful move is to pull the text out of it, not to change which picture format holds it.
AVIF to PNG, measured rather than promised
Running AVIF to PNG against the real engine with a real file, ImageMagick wrote 4,453 bytes of PNG in under a tenth of a second, machine otherwise idle. That is one AVIF file on one day and not an average, which is why the number is given together with the file that produced it.
The AVIF to PNG verdict was reached by a format signature, meaning at least four bytes unique to the format were found at the right offset. Which check was used matters, because they do not all prove the same thing, and a status code of 200 proves nothing whatsoever about whether the PNG file has anything inside it.
The same AVIF file, sent somewhere else
Other outputs the probe measured out of an AVIF file, so the cost of choosing PNG can be read against something. Sizes do not compare across engines, because each family was probed with its own AVIF witness file.
AVIF to PDF: 94,782 bytes in under a tenth of a second, verified by a format signature.
AVIF to JPG: 1,705 bytes in under a tenth of a second, verified by a format signature.
AVIF to WEBP: 380 bytes in under a tenth of a second, verified by a format signature.
AVIF to GIF: 3,463 bytes in 0.1 seconds, verified by a format signature.
AVIF to TIFF: 108,264 bytes in under a tenth of a second, verified by a format signature.
Other ways into PNG, and what they measured
Among the published routes into PNG, AVIF is the first largest output of the 13 measured. The witness files differ, so this ranks the probe run and not your document.
PSD to PNG: 689 bytes in under a tenth of a second.
ICO to PNG: 810 bytes in under a tenth of a second.
HEIF to PNG: 1,403 bytes in under a tenth of a second.
EPS to PNG: 1,303 bytes in 0.1 seconds.
HEIC to PNG: 1,403 bytes in under a tenth of a second.
What we will not pretend about AVIF to PNG
An AVIF file over 25 MB is refused before the upload finishes rather than after it, so you do not wait for a rejection.
An AVIF to PNG run that passes 30 seconds is killed, and the ImageMagick process is killed with it. A run left behind would sit on one of the machine's two cores until somebody noticed.
No text is read out of the AVIF anywhere on this path. Converting a picture to PNG never turns it into words, whatever the picture happens to contain.
ImageMagick was not saturated at sixteen simultaneous conversions: it held 47.5 a second while latency moved from 0.22 s to 0.34 s, and the service memory did not move off 51 MB. That is the measured headroom behind AVIF to PNG, not a marketing number.
One AVIF file at a time, chosen in the browser. There is nothing else to set up and nothing else on offer.
AVIF to PNG: what people ask
What actually converts my AVIF file to PNG?
ImageMagick does it, 6.9.12, on a machine we rent and watch. Not a browser trick and not somebody else service: the AVIF file is uploaded once, ImageMagick runs once, the PNG comes back, and neither file is kept afterwards.
How long does AVIF to PNG take?
On the file the probe used, ImageMagick took under a tenth of a second and wrote 4,453 bytes of PNG. That is one real measurement on one real AVIF file, not an average and not a promise about yours: a larger AVIF takes longer, and past 30 seconds the run is stopped.
What do I lose going from AVIF to PNG?
The one to know about first: Every frame of the AVIF but the first. AVIF can hold an animation and PNG cannot, so frame one is what comes back. The alternative would be one numbered PNG file per frame and no single answer to hand you.
My AVIF is animated. Will the PNG be?
No. An AVIF can hold a whole sequence and a PNG holds one image, so what comes back is the first frame. The alternative would be one numbered PNG per frame, and there is no single file to hand you at the end of that.
Is AVIF to PNG free?
There is a free allowance every month, and one AVIF to PNG conversion costs half a credit against it. When the allowance runs out the tool says so and stops, rather than quietly handing you a worse PNG.