Audio Joiner
Combine songs, recordings or voice notes into one file.
Add the files, sort them with the arrows, choose MP3 or WAV and an optional pause between the files. Different sample rates are converted automatically, and the files can come from any app or recorder.
The conversion runs inside your browser with WebCodecs, the video engine built into modern browsers. That is why there is no upload, no queue and no file size limit set by us: only your device's memory limits it. Your file stays private.
Only want to measure? The LUFS meter shows integrated loudness and true peak without changing the file.
Converter engine: Mediabunny (MPL-2.0) on WebCodecs. MP3 encoding: LAME (LGPL).
How it works
- Drop your file Or tap to choose it. It is read on your device, nothing is uploaded.
- Pick the options If the tool has any, for example quality or target size.
- Save the result Click Convert, wait for 100 %, then Save file.
FAQ
Which formats can I join?
MP3, M4A, WAV, AAC, OGG, FLAC and the sound of video files. The result is MP3 or WAV.
Can I put a pause between the files?
Yes, none, 1 second or 2 seconds.
Is my audio uploaded?
No. The files are joined on your device and never leave it.
Is my file uploaded?
No. The file is processed in your browser and never sent to our server.
Is there a file size limit?
We don't set one. Very large files need enough free memory on your device; a computer handles more than a phone.
Which browsers work?
Chrome and Edge on computers and Android work best. Safari works in recent versions. If your browser lacks a codec, the tool tells you.
Is it free?
Yes. No account, no watermark, no daily limit.