This tool scales every tempo instruction in the file. At 50%, the performance takes twice as long; at 200%, it plays in half the time. Notes and pitch remain unchanged, making slower copies useful for practice and faster copies useful for testing an arrangement.
Change MIDI Tempo
Slow down a MIDI file for practice or speed it up without changing any note pitches.
- Upload a MIDI file.
- Choose a playback-speed percentage.
- Download the tempo-adjusted MIDI.
More Free MIDI Converter tools
MIDI to MP3
Render Standard MIDI files as playable MP3 audio—online, free, and without installing a synthesizer.
MIDI to WAV
Render MIDI as uncompressed WAV for editing, arranging, sampling or archiving.
Transpose MIDI
Move every note up or down by a musical interval while preserving tracks, timing and velocities.
Frequently asked questions
Does changing tempo alter pitch?
No. MIDI timing changes independently of the note numbers, so pitch is preserved.
Are multiple tempo changes preserved?
Yes. Every tempo event is scaled by the same percentage.