Join audio files
Put several recordings end to end as one file, in the order you set.
Runs in your browser. Nothing is uploaded.
Chapters of an audiobook, the two halves of an interview after the recorder stopped, a set of voice memos that are really one conversation. They belong in one file, and the order is the recording.
The picker does not respect that order, so the list is draggable, with sort by name for the common case where the filenames already say it — counting numerically, so part-10 lands after part-9 rather than after part-1.
Files that disagree are made to agree. The first file sets the sample rate and the channel count, and everything after it is resampled and remixed to match before being written, so an MP3, a WAV and an M4A recorded on three different devices come out as one coherent file rather than a stutter at each seam. That does mean the audio is re-encoded once; joining files that already match is the only lossless case, and no tool can do better.
Step by step
- 1Drop in the files.
- 2Drag them into the right order, or sort by name.
- 3Pick a format and press Join.
Questions
Do the files have to be the same format?
No. Anything readable can be joined with anything else — the first file decides the sample rate and channel count and the rest are converted to match.
How do I set the order?
Drag the rows, or press Sort by name to use the filenames. The order shown is the order of the output.
Is there a gap between the files?
No. Each one starts exactly where the last one ended. If you want a pause between them, add it before joining.