Transparency survives intact
PNG stores an alpha channel, so transparent and semi-transparent areas come through exactly as the AVIF held them.
PNG opens in effectively every editor and viewer, keeps transparent areas exactly as they were, and re-saves without another round of lossy compression.
Choose the right format
PNG is the safe destination when transparency matters or the file is heading into an editor, as long as you accept the file size.
PNG stores an alpha channel, so transparent and semi-transparent areas come through exactly as the AVIF held them.
PNG never compresses lossily, which protects the pixels you have and makes photographs far larger than the AVIF they came from.
The new file is written from the decoded pixels, so EXIF, XMP, and any location data stored in the AVIF are not carried across.
Conversion questions
PNG for logos, screenshots, artwork, and anything with transparency. JPG for photographs, where the size difference is dramatic and the quality cost is small.
No. PNG prevents any further loss, but detail the AVIF encoder already discarded cannot be brought back.
AVIF uses modern lossy compression while PNG is lossless. A detailed photograph can easily grow ten times or more.
No. The file is decoded, converted, previewed, and downloaded entirely inside your browser.