Join audio files
Put several sound files together in the order you want. Add a short gap or a smooth crossfade between them, then save one MP3, M4A or WAV.
Files never leave your device
Add at least two sound files to join them.
Listen to each file
Use the arrows or drag the files above to set the order. The joined file follows that order.
A gap is silence. A crossfade lets one file fade out while the next fades in.
Add sound files to join.
Working…
Keep this tab open. Large files can take a little while on a phone.
Done
Send it
Opens your phone's share menu — pick any app.
These open in a new tab. Your file is downloaded first; you attach it there yourself.
Your file is downloaded — attach it in the chat or email.
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How to use it
- Step 1: Tap the box and choose two or more sound files. Press play on each one to check it.
- Step 2: Use the arrows or drag the files into the right order. Choose a gap or a crossfade, and tick Match the volume if the files are loud and quiet.
- Step 3: Choose MP3, M4A or WAV, tap Join the files, and download the one file.
Your files never leave your device
This tool runs entirely in your browser. Nothing is uploaded to a server, so your documents and photos stay private. It is free, has no watermark and needs no sign-up.
Frequently asked questions
Can I join different types of files?
Yes. You can mix MP3, M4A, WAV, OGG, OPUS and the other types the site reads. Files with a different sample rate or a different number of channels are matched automatically, so the joined file plays at one steady speed and pitch.
What is the difference between a gap and a crossfade?
A gap puts a little silence, from half a second to five, between two files. A crossfade lets the end of one file fade out while the start of the next fades in, so they overlap. Use a gap for separate pieces such as stories, and a crossfade for music.
What does Match the volume do?
It measures how loud each file is and raises or lowers each one towards the same level, without letting loud parts clip. Tick it when one recording is much quieter than another. Leave it off to keep every file exactly as it is.
How do I change the order?
Use the up and down arrows beside each file, or drag a file to a new place in the list. The Listen to each file section below shows the same order, with a player for every file.
How many files can I join?
There is no fixed limit. The files are read in small pieces, so many long files do not fill the memory. A very long joined file takes a while on a phone, so keep the screen on and the tab open.
Are my files uploaded?
No. They are joined inside your browser, on your device, and never sent to our servers or anyone else.
Read the guide: How to Join MP3 Files into One →