MID to MIDI Converter
Open legacy .mid files, normalize timing and tempo, and save a clean, standard .midi.
- ✓Up to 50 MB per file · processed entirely in your browser
- ✓No sign-up, no watermark
- ✓Batch mode included
Conversion workbench
Add a file to begin
Drop files here or click to choose · Up to 50 MB per file · processed entirely in your browser
.MID .MIDI .RIFF
What does this MIDI converter do?
A quiet workbench for MIDI itself: open a file, see its notes and tempo map, fix what needs fixing, and save a clean copy in whichever format you need next.
MIDI files come out of thirty years of software: different tick resolutions, tempo conventions, stray program changes. This tool re-serializes any standard file through one clean pipeline — with optional transposition, quantization and tempo scaling on the way — then writes standard MIDI, MusicXML or MP3.
Tips for better results
Quantize gently. An 1/8-note grid keeps a performance alive while fixing sloppiness; a 1/16 grid is for programming, not transcribing. Always keep the original file.
How it works
- 1
Load your source
Drag the file in — it opens locally, nothing is sent anywhere.
- 2
Check and adjust
Preview the result on the roll or the staff, and adjust options like transpose or tempo.
- 3
Export in the format you need
Save the converted file straight to your device.
Formats & limits
Input: MID files up to 50 MB. Output: MIDI. Everything is processed locally; files are never uploaded.
Highlights
Instant preview
Every conversion is auditioned on the built-in roll or staff before you export.
Lossless round-trips
Conversions preserve pitches, timing and velocities — no silent 'optimization'.
Batch friendly
Queue a whole folder of files when you are cleaning up a library.
Frequently asked questions
Yes, completely — no account, no watermark, no daily cap.
No. The whole pipeline runs in your browser and nothing leaves your device.
Yes — the piano roll supports moving, resizing, transposing and deleting notes before any export.
After the first load, yes: the page and the model are cached by your browser.