Convert64 2.3 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application is categorized as System Tools. 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. The actual developer of this software for Mac is Pascal Harris.
From the developer:
Convert64 helps users convert Base64 files to binary and vice versa. It also helps users figure out the file type of a file that is missing its extension. Convert64 can also wrap your base64 encoded data in CSS or HTML. Convert64 will even estimate the final size of the base64 encoded data before you start the conversion process.
You may want to check out more Mac applications, such as PDF Enhancer, Convert It Mac or Zip View, which might be related to Convert64.