Tools for JPEG optimization? [closed]

Answer 1

I've written a command line tool called 'picopt' (similar to ImageOptim) that uses external programs to optimize JPEGs, PNGs, GIFS, animated GIFS and even comic book archive contents (CBR/CBZ).

This is suitable for use with homebrew on OS X or Linux systems where you have installed tools like jpegrescan, jpegtran, optipng, gifsicle, etc.

https://github.com/ajslater/picopt

Answer 2

I too would recommend ImageMagick. It has a command line option to remove EXIF metadata

mogrify -strip image.jpg

There are plenty of other tools out there that do the same thing.

As far as recompressing JPEGs go, don't. JPEGs are lossy to start with, so any form of recompression is only going to hurt image quality. However, if you have losslessly encoded images, some encoders do a better job than others. I have noticed that JPEGs done with Photoshop consistently look better than when encoded with ImageMagick (despite the same file size) due to complicated reasons. Furthermore (and this is relevant to you), I know that at least Photoshop can save JPEGs as optimized which means they drop compatibility with some stuff that you probably don't care about to save a couple of KB. Also, make sure you don't have any colour profiles embedded and you may be able to save another couple of KB.