ImageOptim is a free app that makes images take up less disk space and load faster, without sacrificing quality. It optimizes compression parameters, removes junk metadata and unnecessary colour profiles.
Here are the main reasons why I would recommend this piece of software to anyone who uses a Mac:
- Open-source
- Gets amazing results
- Super easy to use
- Saves over the original image (no need to duplicate or ‘save as’)
- Runs locally, no need for an Internet connection
- Can be run straight from the Finder ‘Services’ menu
- Robust. It has never crashed on me
It is not perfect:
- Some images take a fair while to get optimised (not ages, but it is noticeable)
It can be downloaded here for free.