How well does it do? That varied depending on format - at least for our tests. And it's fairly quick, so you're not kept in suspense for very long.

Once you've pointed it to your source files, chosen an output folder, perhaps configured an option or two, one click is enough to begin optimisation. In use, the program follows the usual format. Although, fortunately, you can adjust most of this in the program's settings. By default it may change formats, resize images, re-encode JPEGs with a reduced quality and strip out metadata in an effort to shrink your pictures. FILEminimizer Pictures (opens in new tab)įILEminimizer Pictures takes a more drastic approach to image compression than most of the competition. Clearly most people will be better off elsewhere. But even then the overall size of our images fell by a very feeble 1.2 per cent. Fortunately, you can tell Caesium not to write a file in that case.

It can only output 24-bit files, so if you're using anything else then your images will probably grow in size.Īnd the program's results clearly illustrated the problem, with most of our test PNG web graphics actually increasing in size. There's no lossless option it just reencodes the file at your chosen quality setting.Ĭaesium does provide support lossless PNG compression, although this has a major limitation. Click the Add program, choose your images, select an Output folder, click Compress and you'll have your results within seconds.īMP compression isn't of interest to us, and the program's JPG technology isn't anything special, either.

Caesium is a simple open source tool that helps you to compress PNG, JPG and BMP formats.

Default mac file compression software