What this tool changes
Snap note starts and ends to a selected grid. Every edited note keeps a positive duration, while non-note events remain in the file.
Timing cleanup
MIDI quantizer online
Snap note starts and ends to a selected grid. Every edited note keeps a positive duration, while non-note events remain in the file.
Open this MIDI quantizer tool
The interactive tool loads with JavaScript. MIDI parsing, editing, preview, undo, and download then run locally in your browser.
Load interactive toolWhat stays in the file
Events outside the selected operation remain in the low-level MIDI timeline. An untouched download returns the exact source bytes.
Supported files
Use an SMF Type 0 or Type 1 file with PPQ timing, up to 5 MB and 20,000 events.