Workbench
Tools
Utilities for the everyday questions of MIDI work. Everything runs in your browser, and files you open are never uploaded.
Files & devices
- MIDI Reader Open a .mid file and see every part explained: tracks, tempo map, controllers, SysEx, a piano roll, and the raw bytes. Play it with sampled instruments.
- SysEx builder Assemble System Exclusive messages with manufacturer IDs, Roland checksums and 7-bit value encoding.
- Web MIDI monitor Plug in a controller and watch every incoming message decoded live, with a keyboard view and meters.
Calculators & references
- Message decoder Paste raw bytes and see each message decoded, running status and real-time bytes included.
- VLQ encoder Convert delta-times and lengths to and from Standard MIDI File variable-length quantities.
- Tempo calculator BPM, microseconds per quarter note, ticks, and MIDI clock intervals.
- Note table All 128 note numbers with names, frequencies and GM drum sounds. Click to hear.