This is a competently Free Online Open Tool to image compressor to 20kb to lowers file sizes.
There are two types of compression: lossless and lossy. Lossless compression is when the compression tool removes empty, needless, or duplicated bits from the original file. This results in a smaller file that has the exact same quality as the original. Lossy compression is when the compressor removes excessive or unimportant bits from the original file. This results in a smaller file but with a reduced quality. With lossy compression, how small you want the final file to be will depend on how much loss of quality you’re comfortable with.