Audio Merger
Combine multiple audio files into one. Free, no signup, no upload.
How It Works
Select two or more audio files (MP3, WAV or M4A). Put them in order with the arrows. They are decoded, concatenated in order, and exported as a single WAV file. You can preview and download the result. No file is ever uploaded to a server.
Why Merge Audio?
Audio merging is useful for combining multiple recordings into one file — joining podcast segments, assembling a playlist into a single track, combining voice memos, or stitching together music clips.
Tips for a Clean Merge
For the smoothest result, merge files that share the same sample rate and channel layout — mixing very different recordings still works but can change how the output sounds. The merger matches the output to the highest channel count among your files, so a mono clip joined with a stereo clip is played through both channels. Use the arrows beside each file to set the order before merging. Once merged, use the built-in player to check the joins, then download the single WAV file.
Frequently Asked Questions
How do I combine multiple WAV files into one?
Select two or more WAV files with the file picker, check they are listed in the order you want, then click Merge Audio. The files are joined end to end into a single track that you can preview and download as one WAV file.
What audio formats can I merge?
You can select MP3, WAV and M4A files, including iPhone voice memos. The browser decodes each one and the merged result is always exported as a WAV file, so the download is named merged.wav regardless of the input formats.
In what order are the files joined?
The files are joined in the order shown in the list. Use the up and down arrows next to each file to change the order before you merge.
Is there a limit on how many files I can merge?
There is no fixed file count, but everything is processed in your browser's memory, so very large or very long recordings can be slow or run out of memory on low-powered devices. Merging a handful of normal-length clips works smoothly.
Are my audio files uploaded to a server?
No. Decoding and merging happen entirely in your browser using the Web Audio API and nothing is uploaded. Your audio never leaves your device.