You can indeed, if you slice off everything after and including the zlib adler32 checksum. In some situations you might need to add some extra (compressed) padd

You can indeed, if you slice off everything after and including the zlib adler32 checksum. In some situations you might need to add some extra (compressed) padding bytes to flush the pixel data you care about through the parser state machine. This works in every browser I tested (as a consequence of their ability to preview partially-downloaded files) but not in many standalone image viewers (since they usually expect whole files).