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Merge audio files

Join several MP3, M4A, WAV, OGG or FLAC files into one, in the order you choose, with a silence or a crossfade. Free, no upload.

  • Free
  • No sign-up
  • No file uploaded
  • Windows, Mac, Android, iPhone

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About this tool

Join the parts of a recording, the chapters of an audiobook or several songs into one file. Drop your files, put them in order, choose a silence or a crossfade between them and an even volume, then save.

When to use it

Rejoin a recording

Join the parts of a meeting or interview split into several files.

Make a mix

Chain several songs with a crossfade for a party or a workout.

Audiobook

Join the chapters into a single file that's easy to listen to.

How to use

  1. Drop at least two audio files or videos.
  2. Put them in the order you want.
  3. Choose a silence or a crossfade between them.
  4. Choose the format and merge.

How it works

Each file is decoded in your browser, then brought to the same sample rate and number of channels. Volume can be evened out so every part has the same peak level.

The parts are then joined end to end, with a silence or a crossfade, and encoded to MP3, M4A or WAV with the Mediabunny library. Nothing is uploaded.

Tips for best results

  • A 2 to 3 second crossfade suits music; a one-second silence suits voice recordings.
  • Even out the volume if the files come from different devices.
  • Choose WAV if you want to edit the result further.
  • To cut a part before merging, use “Cut audio”.

Common problems and fixes

A file is rejected

Your browser may not read its format: convert it first.

The final file is very large

Choose MP3 rather than WAV.

One part is louder than the others

Tick “Even out the files' volume”.

Frequently asked questions

Are my files uploaded?

No, merging happens in your browser.

Can I mix formats?

Yes, MP3, M4A, WAV, OGG, FLAC and video sound can be merged together.

How many files at most?

There's no fixed limit: only your device's memory counts.

Can I change the order?

Yes, drag the files or use the Move up and Move down buttons.

Related searches

Still stuck?

Ask on the forum: the category, the tool, your device sheet and the test result will be filled in for you.