Audio tool

Convert Opus Files to MIDI on Your Device

Convert Opus to MIDI in your browser for music-event exchange. The source remains on your device throughout local processing.

Route OPUS → MIDI

or drop here · up to 500 MB

Max 50 MB per file

Preview (optional)

When your browser supports it, your audio plays here. You can still convert your file if preview does not load.

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Use upload name

On-device encoding can work the processor harder than ordinary playback during this Opus-to-MIDI job.
Large Opus inputs may take several minutes on older hardware.
Compare the MIDI duration with the source before publishing.

MIDI serves DAWs, instruments, and notation tools, whereas Opus commonly serves voice chat, streaming, and efficient web audio.
For Opus-to-MIDI delivery, plan for sound depending on the playback instrument.
After leaving Opus, the receiving app must support the streams encoded inside MIDI, not only its extension.

Opus to MIDI taking too long? Check available memory; long, high-resolution sources need substantially more.
MIDI converted from Opus not opening? Test a compatible player and inspect the output streams.
If MIDI is rejected, compare its codec and stream settings with the destination specification.

When does Opus to MIDI conversion make sense?

It is useful when Opus media created for low-latency delivery must enter a MIDI system designed for music-event exchange.

Where is the Opus source processed?

The browser prepares MIDI from Opus on this device instead of sending the source to a remote conversion server.

How can I approve MIDI converted from Opus?

Test the MIDI file in the receiving app and compare duration, channels and loudness with the Opus source.

Quick use cases