MIDI to MP3 Converter

Turn a Standard MIDI file into portable stereo MP3 audio with General MIDI instruments—free and in your browser.

Convert your MIDI

Your MIDI stays in this browser. Songparts fetches the instrument SoundFont, then renders and encodes locally.

Choose a MIDI file

.mid or .midi · up to 10 MB · drag and drop supported

Output settings

Encoded with LAME at 44.1 kHz stereo.

Choose a MIDI file to begin.

How to convert MIDI to MP3

  1. 1. Choose a MIDI file. Select or drop a .mid or .midi file. The browser checks its duration, note tracks, tempo, and drums locally.
  2. 2. Pick a bitrate. Keep 192 kbps for a practical balance, choose 128 kbps for smaller files, or 320 kbps for the highest available MP3 setting.
  3. 3. Convert and download. Preview the General MIDI render, then download the encoded MP3. No account or file upload is required.

MIDI instructions become rendered audio

MIDI stores performance instructions—not a recorded waveform. MP3 stores compressed audio that ordinary media players can play.

This converter renders those instructions with a General MIDI SoundFont. Instrument tone may differ even when the notes and timing match.

Bitrate, file size, and WAV quality

A higher bitrate keeps more encoded detail but creates a larger file. For most listening and sharing, 192 kbps is a calm default.

MP3 is lossy. If the next step is editing, mastering, or archiving, use the MIDI to WAV Converter for uncompressed 16-bit stereo PCM.

Private, bounded browser conversion

The selected MIDI and rendered audio remain in browser memory. The file is not uploaded or persisted.

If a conversion fails or seems stuck

Watch the named stage, retry the prepared MIDI, use a shorter file, close memory-heavy tabs, or try a current desktop browser.

FAQ

Is this MIDI to MP3 converter free?
Yes. You can convert, preview, and download an MP3 without an account or payment.
Is my MIDI file uploaded?
No. The selected MIDI is read, rendered, and encoded in your browser.
How does MIDI become an MP3?
The browser renders MIDI through a General MIDI SoundFont, then encodes the audio as MP3.
Are instruments, drums, and tempo changes supported?
Yes. The render includes General MIDI programs, drum notes, timing, and supported controllers.
Why can it sound different from my DAW?
MIDI does not contain a fixed recording, and this converter cannot reproduce an external DAW mix.
Which MP3 bitrate should I choose?
192 kbps is a balanced default; 128 kbps is smaller and 320 kbps is larger.
Is MP3 lossless?
No. Use MIDI to WAV when you need uncompressed stereo PCM.
How large can the MIDI be?
The input limit is 10 MB, 10 minutes, and 100,000 notes.
Which browsers support conversion?
Current desktop browsers work best.
What should I do if conversion fails?
Cancel and retry, check your connection, or choose a shorter MIDI.
Can I edit the MIDI here before converting?
No. Use a MIDI editor or DAW first if you need to change the arrangement.
Can I convert MIDI to WAV instead?
Yes. The MIDI to WAV converter creates an uncompressed stereo file.

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