Please note that this randomizer is NOT endorsed or supported by Spotify. It was created because the shuffle functionality on the Spotify app is mediocre at best.
Also, it was inspired by the folks at TextMechanic (http://textmechanic.com/text-tools/basic-text-tools/sort-text-lines/). TextMechanic limits you to four randomizes per hour. This randomizer has no limits.
*** This only works for the Spotify desktop app on Windows/Linux/Mac. It does not work with the web player or smartphone app. ***
1. Just go to the playlist you want to randomize and press Ctrl + A to select all songs or hold Ctrl and select individual songs by clicking on them. Then press Ctrl + C to copy the selected songs.
2. Press Ctrl + V to paste your tracks into the textarea below. Make sure the textarea is empty beforehand. Once you've pasted the links, click the Randomize button as many times as you want.
3. Click on the Copy button to select all the randomized links, and then return to the Spotify desktop app. You now have two choices: