MIDI ToolboxMIDI Toolbox
Conversion Settings
Configure output format and audio quality

Output Format

Advanced Options

-6 dB
Professional Tool

MIDI to MP3/WAV Converter with Synth and SoundFont

Convert MIDI files to MP3 or WAV online with high-quality audio rendering. Support for multiple synth voices, Custom SoundFont, adjustable bitrate, and volume control. Achieve cinematic audio quality locally in your browser.

Key Features

Convert MIDI to MP3 or WAV format

Multiple synth voices (Synth/AM/FM/Duo/Membrane)

SoundFont support for realistic piano sound

Adjustable bitrate (128-320 kbps)

Volume control and preview before export

Local processing, no upload required

How to Use

1

1. Upload MIDI File

Select a .mid or .midi file from your computer. The file will be parsed locally in your browser.

2

2. Choose Format & Settings

Select output format (MP3/WAV), synth voice, bitrate, and adjust volume as needed.

3

3. Preview Audio

Play the audio preview to ensure it sounds correct before converting.

4

4. Convert & Download

Click convert button and wait for the rendering process to complete.

5

5. Save Your File

Download the converted audio file to your computer.

FAQ

Technical Specifications

Audio engine: Tone.js with offline renderingSupported formats: MP3 (128-320 kbps), WAVSoundFont: SF2 format supportProcessing: Local, browser-basedBrowsers: Latest Chrome/Edge/Safari

Related Tools

MIDI Player
Play and preview MIDI files
Learn More
MIDI Editor
Edit MIDI before converting
Learn More
Sheet Music Converter
Convert MIDI to sheet music
Learn More

Privacy & Security

All MIDI conversion and audio rendering happens entirely in your browser. No files are uploaded to any server. Your music stays private and secure on your device.