Welcome!
I build the web apps I wish already existed.
Every music tool here comes from more than 20 years of playing music—things I genuinely find useful.
Please give them a try! (๑˃̵ᴗ˂̵)و
Created by Yoshito Kimura
For the update history (in Japanese), see the Japanese page.
Services / Web Apps I've Made
Music Theory Apps
- ① Look up the notes of a chord (140+ types)
- ② Look up the notes of a scale (70+ types)
- ③ Search for chord and scale names
- ┗ Reverse lookup with a MIDI keyboard
- ④ Chord progression collection
- ⑤ Diatonic chord tables
- ⑥ Explore modulation intervals and key relationships
- ⑦ Calculate note values
- ⑧ Metric modulation
- ⑨ Transpose chord progression text
- ⑩ Visualize a string instrument fingerboard
- ⑪ Reverse lookup chord / scale names from the fingerboard