Arduino Ide 2 Portable
If you go to a maker space or a friend's house to show off the project, you would normally have to install the IDE on their computer, download the libraries again, and configure the settings. With the version on a USB drive, you simply plug it in, run the .exe , and every library and setting is exactly as you left it.
Let's clarify the terminology first.
While there is no native toggle, you can achieve a semi-portable setup by manually redirecting the IDE's data and configuration paths. Manual Configuration for Portability arduino ide 2 portable

