or
Free: up to 20 files (max 100MB total). Pro: higher limits (soft cap applies).
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Note-level CSV fields + example output. Runs locally in your browser (no uploads).
Each row represents a single note event - ready for Sheets/Excel and scripts.
track
channel
pitch
note_name
start_seconds
duration_seconds
velocity
Note: track is the MIDI track index in the file. Many MIDI files use a single track - use channel to separate parts.
Conversion runs entirely in your browser. Your MIDI files never leave your device.
Columns: track, channel, pitch, note_name, start_seconds, duration_seconds, velocity
track,channel,pitch,note_name,start_seconds,duration_seconds,velocity
1,13,50,D3,5.18788,0.098682,98
1,4,60,C4,3.561968,1.799781,78
1,4,56,G#3,3.561968,1.799781,78
1,13,53,F3,5.30066,0.098682,54Many MIDI files use a single track. In that case, track stays 1 for all rows — group by channel to separate parts.
df.groupby('channel')Tip: channel 10 is commonly used for drums (varies by file).
Upload MIDI files, convert in seconds, and download CSV (or ZIP for batches).
Drop MIDI files here (or click Select MIDI files).
Click Convert, then download CSV (or ZIP for batches).
Open in Sheets/Excel or import into your analysis pipeline.
All conversion runs in your browser. Your MIDI files stay on your device.
Higher limits, 3× faster workers, retry tools, and report.json for large batches.
Higher batch limits: Free up to 20 files / 100MB; Pro removes the hard block (soft warning around 200 files / 1GB).
Faster conversion: 3 workers in Pro vs 1 in Free.
Retry tools: Retry failed conversions (batch + per-file).
Export report.json (and include it automatically in ZIP downloads).
Quick answers about CSV fields, local processing, batch limits, and Pro features.
Yes. Free tier supports batch conversion up to 20 files / 100MB total. Pro removes the hard block and adds heavy-batch tools.
No. Conversion runs 100% locally in your browser. Your files stay on your device.
track, channel, pitch, note_name, start_seconds, duration_seconds, velocity.
Yes. Upload multiple files and download results as a ZIP. (Free tier has batch limits; Pro supports larger batches.)
Pro uses 3 concurrent workers to speed up batch conversion (Free uses 1).
Pro can export a report.json file for batch runs, and ZIP downloads include it automatically. It helps you audit results programmatically.
Pro includes batch retry tools (Retry all failed and per-file retry) to recover failed conversions quickly.
Because many MIDI files are single-track. track refers to MIDI track chunks in the file, not necessarily DAW instrument tracks. Use channel to separate parts, and verify structure in MIDI Inspector.
Tutorials and examples for converting, inspecting, and working with MIDI data.