chords·lol vs ChordU

chords·lol is a free browser platform for learning and referencing chords, scales, keys, progressions, and music theory. Its index contains 360 chords across 30 qualities and twelve roots, with notes, intervals, keys, and playable diagrams for guitar, piano, ukulele, bass, mandolin, and banjo. The learning library lists 107 scales, 30 keys, 30 progressions, and 26 theory guides. Nine browser tools include chord and scale finders, a transposer, ear training, a progression generator, and a metronome. The site provides 19 printable PDF charts covering chords, scales, and keys. Tools require no account or signup; the maker says there are no email gates or paywalls. Chord and scale data, audio, and PDFs may be downloaded for personal, classroom, and non-commercial use. Privacy information describes anonymous Vercel Analytics and PostHog usage data, Do Not Track support, no data sales, and no third-party advertising scripts. Terms provide no warranty of accuracy or fitness for a particular purpose.

ChordU identifies chords in audio and aligns them with musical notation. Users can also find a song on YouTube, copy its link and search for it in ChordU. A song may have simplified, advanced, bass or edited chord arrangements, as well as treble-clef and bass-clef note versions. Chord diagrams cover guitar, piano, ukulele and mandolin. On the website, users can obtain PDF chord and note sheets, MIDI files and synthesized notes in WAV format. MusicOnly mode provides controls for vocals, bass, drums and other instruments, and can export a mixed audio download. Local music uploads and MusicOnly for those uploads require Premium; Premium also permits chord downloads without a stated monthly limit. The Free plan has limited access, while Premium costs $5.00 per month. ChordU is available on Android, iOS and the web. Its terms limit song and chord use to personal, non-commercial purposes.