Put several recordings end to end in one file. Reorder them, crossfade the joins or leave a gap — all without uploading a thing.
Files with different sample rates or channel counts are matched up automatically — everything is lifted to the highest of the two so nothing is degraded.
The Audio Joiner glues several recordings into a single file — in the order you choose, with the kind of join you choose.
Add as many files as you like, drag them into order with the arrows, and pick how the seams should sound: a straight cut where one starts the moment the last ends, a crossfade where they overlap and blend, or a gap of silence between each one. Crossfades use an equal-power curve, which keeps the volume steady through the overlap instead of dipping in the middle.
Mixed formats are fine — an M4A voice memo, a WAV export and an MP3 download can all go in together. Differing sample rates and mono-versus-stereo are reconciled automatically by lifting everything to the highest quality present, so no file is quietly downgraded.
No. Mix MP3, WAV, M4A, OGG, FLAC and anything else your browser can play. They are all decoded to raw audio before being joined.
Everything is matched to the highest setting present, so a mono file joined to a stereo one is placed in both channels rather than the stereo file being flattened.
No fixed limit, but every file is held decoded in memory at once, so dozens of long tracks will strain a phone. A handful of songs or a few hours of speech is comfortable on a laptop.
A straight cut can click if the two files end and start at different levels — choose a short crossfade of half a second and that disappears. The "even out the levels" option also helps when one file is much louder than the next.
Yes — each row has up and down arrows, and an X to remove it. The order in the list is the order in the output.