Online Converter

Mix Audio

Audio File 1
Audio File 2
Audio File 3 (optional)
Audio File 4 (optional)
End Transition


This free audio mixer can help you mix multiple audio files. The tool supports various audio clips, such as MP3, M4A, MIDI, WAV and more. You need to select at least two files, the third and fourth files are optional. All source audio files will be played together and they will start at the same time. With the "Duration" option, you can control the duration of the output audio If the source audio files have different duration. You can use this tool to add multiple different kinds of background music to you audio files. The output format is MP3 audio.

More Than 4 Files

If there are more than 4 files, select the first 4 files and create an output file, then use the previously output file as the first file and attach the others.

How To Use

  1. Select two or more "Audio File" (such as *.mp3, *.aiff, *.amr, *.flac, *.m4a, *.mid, *.midi, *.ogg, *.wav, *.wma and more).
  2. Select a value in the "Duration".
  3. Select a value in the "End Transition".
  4. Click the "Convert" button to start uploading your files.
  5. Once the upload is complete, the converter will redirect a web page to display the conversion results.

Main Options

  • With the "Duration" option, you can determine how long of the generated audio, which can be the "Default", "Shortest" or "First", by default, the duration value is the longest of all audio files.
  • With the "End Transition" option, you can control when the volume returns to normal at the end of an audio file, it can be 0 seconds, 1 second, 2 seconds, 3 seconds or more.


  • The maximum upload file size is 200 MB.
  • Before uploading, please make sure you agree to the terms of this website.
  • If the file upload process takes a long time or is unresponsive or very slow, please try to cancel and resubmit.
  • This converter cannot support encrypted or protected audio files.

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