Convert to PNG when you need lossless quality and maximum compatibility. PNG works everywhere, requires no special software, and preserves perfect image quality. AVIF's modern compression is excellent, but PNG's universal support makes it better for archiving and sharing.
The conversion preserves the visible quality from the AVIF file. However, since AVIF uses lossy compression, converting to PNG won't recover any quality lost during AVIF's original encoding. PNG will prevent any further quality loss from future edits.
Yes, PNG files can be 3-10 times larger than AVIF because PNG uses lossless compression while AVIF has superior lossy compression. The trade-off is perfect quality preservation and compatibility with all devices and software.
PNG supports transparency like AVIF, but doesn't support HDR or advanced color features that AVIF offers. For most images, PNG provides all the features you need with much broader compatibility.
Use AVIF for modern websites where file size is critical and users have current browsers. Use PNG for archiving master copies, editing workflows, compatibility with older software, or when you need guaranteed universal support.