MIDI Utility

Text → MIDI

Upload a .txt file of onset_seconds, duration_seconds, pitch, velocity rows (numeric or note-name pitch, e.g. 48 or C3), build a standard MIDI file entirely in your browser, and preview it back before downloading.

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Drop a .txt file here, or click to browse
One note per line: onset,duration,pitch,velocity
–
Notes
–
Duration
–
Ticks / beat
–
Tempo
Preview (decoded back from the built .mid file)