How to Merge Audio Files into One

Put the files in order

Drop all the files at once, or add more with Add files to join. Each becomes a track in a list, and the result plays them top to bottom; the arrows move a track up or down. The order you dropped them in does not matter — the list does.

Trim each track where they meet

Select a track to open its waveform. Trim the silence off the end of one and the start of the next so they meet cleanly, or cut a section out of the middle of a track. Each track keeps its own edit, and the list shows the length each one will contribute.

Mixing formats

MP3, M4A, WAV, FLAC, OGG and the soundtracks of MP4 and MOV videos can go in the same list. They are converted to one sample rate and channel count before joining, so a mono voice memo can follow a stereo song without any preparation.

Joins, gaps and fades

Tracks are joined sample to sample: no silence is inserted and there is no crossfade between them. For a pause, leave some silence at the end of the earlier track when you trim it. A fade in at the very start and a fade out at the very end of the result are available when you save.

Saving the result

Choose MP3 to share it, M4A for Apple devices, WAV or FLAC to keep editing without further loss, or OGG for the smallest file. The whole job happens in your browser, so the recordings are never uploaded.

Step by step

1. Drop the files you want to join.
2. Order them with the arrows.
3. Select each track to trim it where it meets the next.
4. Add a fade if you like, preview, choose a format and save.

Frequently asked questions