When PNG is the right choice
PNG is useful for workflows that specifically require it. It often creates a much larger file than JPG for photographs. Exporting a compressed HEIC to PNG does not recover details already lost in the source.
Convert, inspect, save
Choose your HEIC, keep PNG selected and convert. The preview shows the result and its dimensions. Check the file size before downloading, especially for camera originals.
Size limits work differently for PNG
The quality slider does not control PNG compression. To reach a byte limit, PixelPort needs permission to reduce dimensions. If you need the exact original dimensions and a very small file, consider JPG or WebP instead.