Downloading JPEG Jackal 2.0.6 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The application lies within Design & Photo Tools, more precisely Converters. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This Mac app is a product of Pavel Kosykh.
From the developer:
Meet JPEG Jackal ! JPEG Jackal is simple, powerful and quick tool for home and professional usage, that can help you to optimize pictures size and save disk space or internet traffic. It uses special compression algorithm to give you best jpeg quality.
You may want to check out more software for Mac, such as JPEG Jackal, JPEG to PDF or 4Videosoft PDF to JPEG Converter, which might be related to JPEG Jackal.