BuzzKit
Audio Merger
Join two or more audio files together, in order, into a single track. Output is always MP3, so a WAV input becomes lossy.
Files merge in the order you selected them.
Merging concatenates each file's audio stream in sequence.
How the audio merger works
ffmpeg's concat filter joins each file's decoded audio stream into a single continuous track.
Select files in order
Choose two or more — the order you pick is the order they'll play.
Merge
ffmpeg concatenates them into one stream.
Download
Get back a single MP3.
How to use the audio merger
The audio merger joins several files into one continuous MP3, in the order you select them. It suits podcast intros and outros, chapters of a longer recording, voice notes, and short music clips that you want to play back to back.
Select the files in the order they should play, because the sequence you pick is the final order. Tidy up each part first with the Audio Trimmer, and use the Audio Compressor afterward if you need a smaller file to share.
Frequently asked questions
Do the files need matching formats?
No, but similar sample rates avoid any audible pitch or speed shifts.
Is there a limit on file count?
No hard limit, though more files means more processing time.
Can I add a gap between clips?
Not directly — trim silence into the ends of a clip first if you need a pause.
Are my audio files uploaded anywhere?
No. The files are joined in your browser tab using ffmpeg compiled to WebAssembly, so they stay on your device.
What format is the merged file?
A single MP3, whatever formats your source files were in. Output is MP3, so a WAV input becomes lossy.