Merge Audio
Join several audio files into one continuous track, in the order you upload them. Useful for stitching recorded segments, chapters or clips into a single file without opening an audio editor. It is free, needs no account, and adds no watermark to your result.
Merge Audio
Add your files. Recommended settings are ready, so you can process in one click.
PDF, Word, images, audio, video, archives and more
Up to 100 files · 250 MB · No account- 1Add files
- 2Choose an action
- 3Download or keep going
What people use it for.
What happens to your file.
The files are joined in one pass with FFmpeg, in upload order: each is converted to the same sample rate and to stereo, and they are written as one track in the format you choose, MP3, M4A or WAV. Encoding once, rather than converting each file and gluing the results together, is what keeps the joins free of clicks and small gaps. You can add a few seconds of silence between files, or crossfade each file into the next.
Where it stops: Files are joined one after another, or overlapped by the crossfade. Mixing tracks on top of each other, such as music under a voice, needs a multi-track editor.
What happens to your files
- They are joined in the order they were added into one file called merged-audio, as MP3, M4A or WAV.
- Every file is converted to the same sample rate and to stereo on the way, so MP3, WAV, M4A and other formats can be mixed.
- Silence between files and a crossfade are both optional, in the settings.
- A file with no sound is named in a message instead of failing the whole job.
- A mono recording becomes stereo with the same sound in both channels.
- At least two files are needed.
Before you merge
- Add the files in the order they should play. Files picked together usually arrive in name order, so names such as 01-intro and 02-interview help.
- Quiet and loud recordings keep their own levels. Run Normalize Audio on the result, or on each part, if the jumps matter.
- Silence at the start or end of a file stays; trim it first with Trim Audio.
Everything you need, without a paywall.
Common questions.
What order will the files be in?
Upload order, so name them sequentially if the order matters.
Can I merge files with different formats or bitrates?
Yes. They are converted to a common sample rate and to stereo in the same pass that joins them, which is what prevents clicks and gaps at the joins.
Can I fade between clips?
Yes. Set Crossfade to the number of seconds each file should fade into the next. A crossfade has to be shorter than half of the shortest file.
Can I get WAV or M4A instead of MP3?
Yes. Choose MP3, M4A or WAV as the output format. WAV is uncompressed, for editing; M4A is smaller than MP3 at the same quality.
You might also need.
Cut audio to a selected start time and duration using FFmpeg and export the result in a common audio format.
Normalize perceived loudness using FFmpeg loudnorm processing for more consistent playback volume.
Convert audio files between MP3, WAV, M4A, FLAC and OGG using FFmpeg with bitrate and quality controls.
Inspect codec, sample rate, channels, duration, bitrate, tags and stream metadata using ffprobe.