Audio Joiner

Audio Joiner places two or more clips one after another and downloads one WAV. Every clip must share the first clip's sample rate, or the join stops.

Order, then one WAV

Add at least two audio files. They join in the order listed, from the first clip to the last, with no gap inserted. One file is rejected with Add at least two audio files. The download is joined-audio.wav. Decoding uses the browser. A file the browser cannot decode fails while it is added. A name that is not an audio type and does not end in mp3, wav, ogg, m4a, webm, or aac fails with Not an audio file and the file name. The output is always WAV, even when every input was MP3. There is no MP3 export and no bitrate control.

Sample rate has to match

The first clip sets the sample rate. A later clip with a different rate stops the join. The message says all clips must share the same sample rate, and it tells you to re-export as WAV from matching sources. Channel counts may differ. The output uses the widest channel count, and a missing channel is filled from the last channel that clip has. A mono clip beside a stereo clip does not change the sample rate rule. Duration of the download is the sum of the clip durations. The panel shows that running total before you join.

What is kept and what is lost

Samples are copied. They are not stretched, pitched, or faded. A clip is not trimmed here. Cut a clip with Audio Trimmer first if you need a shorter piece, then add the WAV. Volume is not changed. A loud clip and a quiet clip stay at their own levels. There is no crossfade. Silence between clips only exists if it was already in a file. Metadata such as title and artwork is not copied into the WAV. If a podcast needs chapter marks, this download will not have them. A one-second clip followed by a clip of two and a half seconds becomes about 3.5 seconds, because the sample counts are added. The panel total should agree with that sum before you press join.

When the join is the wrong shape

Two takes of the same voice, already the same rate, are the case this page is built for. A video file is not an input. A MIDI file is not an input. If the browser plays the file in a tab but this page says it could not decode, trust the error and convert that file to WAV elsewhere before you try again. Reordering means removing a clip and adding it again in the new position. There is no drag handle. Processing stays on this device. The clips are not uploaded. A one-second clip followed by a two-and-a-half-second clip shows about 3.5 seconds before you press join, because the sample counts add. The download name is joined-audio.wav.