NCH Software - 1.80MB (Freeware)
Pixillion for Mac is an application that allows you to easily convert image files and digital photos between all popular file formats. It is possible to convert or compress thousands of photos all at once with the one-click batch conversion feature.
Key features include:
You can also resize your images, add watermarks and text captions and preview any changes before making the final edit.
Once you are happy with the changes made to your images, they can then be shared on the web, emailed to family and friends or displayed on your mobile phone.
Free for non-commercial use: A pro edition with additional features, including batch converting and watermarking images is also available from NCH Software.