faviconit 1.0 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.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The software lies within Design & Photo Tools, more precisely Viewers & Editors. This Mac app is a product of Cocoa Apps.
From the developer:
FaviconIt is one of the easiest ways to convert your icons, logos, or any image file into the suitable sizes for favicons for your website.
FaviconIt supports a wide range of file formats:.psd, .png, .jpg, .bmp, .tif, .gif, add.ai.
The files can all be converted by simply dragging the image you wish to convert to the app and clicking a button.
You may want to check out more Mac applications, such as TurboCAD Mac Designer, PhotoExpress 2 or DropImageURL, which might be related to faviconit.