Masteringo's free Music Analyzer shows a track's BPM, musical key, Camelot code, spectral balance, and loudness. Drop in a file and it's analyzed in your browser, with no upload and no account. Great for DJ workshops: have students count the beat and guess the key by ear, then check their answers.

you.dj offers free, browser-based DJ software that lets users mix music instantly without downloads. Perfect for beginners and casual DJs, it supports drag-and-drop, playlists, and real-time mixing. Ideal for parties, practicing DJ skills, or experimenting with tracks anywhere, it requires only an internet connection and works on any device.

Rave.dj uses AI to blend two songs from YouTube or Spotify into unique mashups instantly. It’s perfect for DJs, music lovers, and creators who want quick, creative mixes without technical skills. Its simple interface makes music experimentation easy and shareable with a community or on social media.