Join Audio Files Online

Upload two or more audio files to this tool. Arrange them in your desired order using the arrow buttons. Optionally set a crossfade duration for smooth transitions. Click merge and download the combined file.

No limit. Add as many files as your device's memory can handle. Each file is decoded in your browser and merged locally.

Crossfade overlaps the end of one track with the beginning of the next, fading one out while fading the other in. This creates a smooth transition instead of an abrupt cut. Set the duration from 0 to 5 seconds.

Yes. You can mix MP3, WAV, OGG, FLAC, M4A, and other formats. The browser decodes each file, and the merged output is a single WAV file.

No. Each file is decoded to a PCM buffer in your browser. The merge concatenates those buffers locally and encodes the result as WAV without any server involvement.

Yes. Use the up and down arrow buttons next to each track to change the order. The merge follows the displayed order.

The tool resamples all files to match the highest sample rate in the set before merging. A 44.1 kHz file joined with a 48 kHz file produces a 48 kHz output. Quality is preserved for all tracks.

Upload all your voice memos at once (drag and drop works). Use the arrow buttons to put them in order. Set a short crossfade (0.5-1 second) for smooth transitions, or leave it at zero for a hard cut. Click merge and download the combined file.

Yes. Upload the intro, interview segments, and outro. Arrange them in order. A 1-2 second crossfade between segments sounds natural. The tool handles different sample rates and formats, so it works even if you recorded segments with different devices.