Magicplaylist creates a whole playlist out of a song that you search

The same does Spotalike

Gnoosic recommends you artists based on 3 ones that you already like.

For every reccomendations, it will ask if you like it, don't like it or if you don't know. It will learn your preferences giving you better reccomendations. 

How Bad Is Your Spotify is probably the most fun website in this list. 

Their sophisticated A.I. judges your awful taste in music in a ironically key. 

to try at all costs. 

Wish "STAY" by Justin Bieber and the kid LAROI lasted longer?

No problem, this website will stretch out a song in order to make it longer. It simple adds and replace the same parts of the song, putting them in a different order. 

Receiptify creates for you a receipt of your most listened songs of the last month/last 6 months and all time. 

It connects with spotify, apple music and last.fm

Every Noice At Once is basically a list with every single music genre in the world 

Music-Map creates for you a map of artists similar to an artist that you like based on people's opinions. 

The closer two names are, the greater the probability people will like both artists.

Tune My Music is a great tool that lets you transfer playlists between music services. 

It Supports Spotify, TIDAL, Apple Music, YouTube, Amazon Music, Pandora and many more