Merge audio files
Combine several songs or audio files into one MP3, in the order you want and with a smooth crossfade.
How to useMerge the audio.
Drag to change the order. The top one plays first.
Available in: 
Merge audio files: what it is for
The tool joins several audio files into a single file, in the order you choose. Between them, keep them back to back, add a 1-second pause or a 2 or 5 second crossfade.
The audio isn't uploaded to any server: everything is processed in your browser, in complete privacy.
How to use
- Upload the audio files.
- Drag to reorder and choose the transition.
- Merge and download the MP3.
When to use it
- Joining voice messages.
- Building playlists and party soundtracks.
- Combining parts of a recording.
Frequently asked questions
Can I merge different formats?
Yes. MP3, WAV, M4A, WhatsApp voice messages and others go in together and come out as a single MP3.
What is the smooth transition?
One song fades out as the next one comes in, like a party playlist. Without it, the files are joined back to back.
Are the files uploaded to a server?
No. Everything runs in your browser.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.