Download of ImageToBase64 1.2.0 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The actual developer of this free software for Mac is TweakNow Indonesia. The software lies within Developer Tools, more precisely Webmaster Tools.
From the developer:
ImageToBase64 is a tool to convert images to Base64 strings (CSS Image). Converting an image to a Base64 string is needed when wishing to embed images directly into a web page. The program does not only provide conversion to Base64 string, but also tells you how to use the string in your web project.
You may want to check out more Mac applications, such as Url Extractor X, Boks or WebPics, which might be related to ImageToBase64.