Audio / MIDI
MIDI Player: Listen, Adjust and Export WAV
Open a format 0 or 1 MIDI file, mute or solo its parts, change tempo from 50% to 200%, transpose melodic notes, and render the whole mix as WAV.
MIDI Player: Listen, Adjust and Export WAV: The player reads the notes, tracks, instruments and tempo changes in a MIDI file and plays them with a piano or synth sound, with drums on channel 10. You can also save what you hear as a WAV file, made with the same sounds. Runs 100% locally in your browser with zero server file uploads.
- Category
- Video tools
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Runs entirely in your browser
Piano attribution
Piano samples are from the Salamander Grand Piano by Alexander Holm, licensed under CC BY 3.0.
Playback controls
Changing a control pauses playback. Press Play to resume with the new settings. Muting takes priority over solo.
How to use it
- Open a .mid or .midi file.
- Choose piano or synth, adjust the parts, and press Play.
- Pause or seek, then export the whole piece as WAV.
Privacy & limitations
MIDI files stay in your browser. Piano samples load from this website's own assets.
Related tools
Frequently asked questions
Does it reproduce every MIDI instrument?
No. Program numbers are shown for reference; melodic parts use your selected piano or synth. Drums use the drum engine and are not transposed.
Will piano work offline?
The piano samples need to have loaded from this website and remain cached. Synth sound does not need sample files.
What are the limits?
Files are limited to 20 MB, 20 minutes of original duration and 100,000 notes. A long WAV export can require substantial browser memory.
Free tool · runs in your browser · no account required