How to save image metadata in PNG files using Python? or Best way to save image metadata to PNG with

PNG uses chunks (like tEXt, zTXt) for metadata, not EXIF. Pillow’s kinda clunky here.

For *full* control, `pngchunk` lib lets you edit chunks directly. Bit more coding, but way more flexible.

Also, avoid spaces in keys—some tools hate that.