jpegoptim doesnt compress file

Question

I have jpegoptim version 1.2.3, and PageSpeed Insights says that I can reduce my image by 36,6 KB (95 %). But using jpegoptim image.jpg --strip-all image.jpg 147x196 24bit JFIF [OK] 39227 --> 39227 bytes (0.00%), skipped. does nothing.

Answer 1

I ran the image through Compress JPG and reduced it to 12K.

Answer 2

jpegoptim could not compress lossless your image, you could add --max=60 to force lossy compression.

A lot of online JPEG optimizers (compressjpeg.com, tinyjpg.com) use lossy compressions.