This is where the search term crosses the line from convenience to illegality. Vector Magic is proprietary software. There is no official "free" version of the desktop edition provided by the developers (Vector Magic, Inc.).

You can download Vector Magic Portable for free from various online sources. However, please be aware that downloading software from unofficial sources may pose a risk to your computer's security. Make sure to download from reputable sources and scan the file for viruses before using it.

In the context of "Portable" software, this usually means someone took the full version of Vector Magic, cracked the executable file to remove the need for a serial key, and repacked it into a single launcher.