Join audio files online
Add two or more clips, set a crossfade, and save one WAV or MP3. Sample rates are matched to the first clip.
Drop clips to join
Add at least two files. You can drop more than once.
MP3, WAV, M4A, OGG, OPUS, AAC, FLAC
Overlap between clips, in seconds.
More options
Equal power keeps the loudness steady through the overlap.
Silence between clips, in seconds. Above zero, the crossfade is skipped.
Brings every clip to a similar loudness before joining.
A smooth ending on the last clip, in seconds.
Last updated:
What is an audio joiner?
An audio joiner merges two or more audio clips into one file, in the order you choose. This one runs in your browser, so the clips are decoded and combined on your own device and are never uploaded. Add the files, reorder them with the drag handles or arrow buttons, and trim or set the volume of each clip before you join. The crossfade controls the overlap between clips, from 0 to 5 seconds, with 0.3 seconds as the default, and 0 gives a hard join. You can pick a linear or an equal-power curve, add a gap of up to 5 seconds, match the volume of the clips, and add a closing fade of up to 10 seconds. Clips with different sample rates are matched to the first clip. Save the result as a 16-bit WAV or an MP3. It is free, with no account and no watermark.
How to use it
- Add clips Drop files in the order you want them played.
- Set the crossfade Zero is a hard join. A short fade hides the cut.
- Save Choose WAV for a full-quality file, or MP3 when you need a smaller one. Nothing is uploaded.
Order matters
Clips play from top to bottom. Drag the handle, or use the arrow buttons, to change the order. Trim a clip, set its volume, or preview it on its own before you join.
FAQ
How many files can I join?
Two or more. The tool does not set a fixed number of clips. The limit is the memory of your device, because every clip is decoded in your browser before they are joined. Drop several files at once or add more later, then reorder them with the drag handles or arrow buttons. If a join feels slow or fails, try fewer or shorter clips.
Do the clips need the same format?
No. The files can be in different formats, such as an MP3 and an M4A. The browser decodes each one on its own, and the clips are then joined into a single file. Clips with a different sample rate are matched to the first clip. The only real limit is a format your browser cannot decode, and the result is saved as WAV or MP3.
Is the join uploaded?
No. The join stays in this tab. Each clip is decoded and combined on your own device with the Web Audio API, and the result is saved straight from the browser, so no file is sent to a server and no copy is kept. Closing or reloading the tab discards the clips. The same applies to the core tools on this site.