What this tool does
Make a non-stop mix for an event, join parts of a recording, or put several voice notes into one file. Add the files, put them in order, choose a crossfade so one song blends into the next, and save one file.
How to use it
- Choose two or more audio files.
- Put them in order with the arrows.
- Choose no gap or a crossfade.
- Tap Join and download.
Why 123ToolBox
Your files stay with youEverything happens inside your browser. Nothing is uploaded to us or anyone else.
Free, no watermarkEvery tool is free. Your result has no logo or watermark.
No sign-upOpen the page and use it. No account, no email.
Made for phonesWorks on cheap Android phones as well as laptops.
FastNo upload or download wait. Small files finish in seconds.
Exact resultsWhen a form says “under 20 KB”, you get under 20 KB.
Popular ways to use it
Questions people ask
How do I merge two songs into one?
Choose both songs, put them in order and tap Join. You get one MP3.
What is a crossfade?
The end of one song fades out while the next fades in, so there is no sudden jump.
Can I join files of different formats?
Yes. MP3, WAV, M4A and OGG can be mixed.
Is my audio uploaded?
No. Everything happens inside your browser. Your file never leaves your device.