Merge Audio Files
Combine several audio files into one continuous MP3: join song parts, put voice notes together, or assemble a podcast intro, interview and outro.
Free · No sign-up · Files stay on your device
How to use Merge Audio Files
- 1Add two or more audio files.
- 2Arrange them in order.
- 3Click "Merge" and download the combined MP3.
Features
- Join up to 20 files
- Mix MP3, WAV, M4A, OGG and FLAC
- Reorder before merging
- High-quality MP3 output
- Private: no upload
Mixing different formats
You can combine different formats and quality levels, such as a WAV intro with MP3 recordings. Everything is converted to a common sample rate and joined into one high-quality MP3.
Private, in-browser processing
This tool uses FFmpeg, the open-source engine behind most professional video software, running inside your browser. The first time you use it, the engine (about 30 MB) is downloaded once and then cached, so later conversions start straight away.
Frequently asked questions
Are my files uploaded?
No. Processing happens on your device with FFmpeg compiled to WebAssembly, so your video and audio never leave your computer or phone.
Can I add gaps between files?
Not yet. Files are joined back to back.
Why does it take a while?
Video processing is demanding, and your browser does it on your own device instead of a big server. Short clips take seconds; long or 4K videos can take several minutes. Keep the tab open until it finishes.