Convert to PNG when you want lossless quality and maximum detail preservation. PNG is ideal for storing master copies of photos, images you'll edit repeatedly, or when you need the highest possible quality without any compression artifacts.
Yes, PNG files are typically 3-5 times larger than HEIC because PNG uses lossless compression while HEIC uses advanced lossy compression. The benefit is perfect quality preservation and universal compatibility.
Yes, both HEIC and PNG support transparency. When converting HEIC images with transparency to PNG, the transparent areas are preserved perfectly.
The conversion process itself is handled carefully, but keep in mind HEIC is a lossy format. Converting to PNG won't recover any quality already lost in the original HEIC compression, but it will prevent any future quality loss.
Only convert to PNG if you need lossless quality or plan to edit images repeatedly. For general photo storage and sharing, HEIC to JPG is more practical due to smaller file sizes while maintaining excellent quality.