Audio Joiner
Merge tracks into one continuous file
100% Private & In-Browser
Processed locally using client-side JavaScript. Your files and data never touch any server.
Instant & Unlimited
No registration, no waiting queues, and no limits on file conversions or generations.
What is Audio Joiner?
Join multiple audio files into a single track — useful for podcasts, DJ sets and audiobook chapters. Re-encodes to MP3 to smooth over mixed formats, all locally.
How to use Audio Joiner
Open Audio Joiner in any modern web browser on your computer, tablet, or smartphone.
Select, drag, or drop your file directly into the Audio Joiner workspace.
The tool processes your data in real time directly on your device using WebAssembly-compiled FFmpeg cores and browser WebCodecs hardware APIs.
Copy your generated result to your clipboard, preview the output, or save your file with a single click.
- Cross-Platform Compatibility — works the same across Windows, macOS, Linux, iOS, and Android.
- No Account, No Email, No Watermarks — open the page and start working immediately.
- Real Media Decoding — a WebAssembly FFmpeg core processes your audio and video on your own CPU.
- Merge tracks into one continuous file
- Handling private or confidential material that should not be uploaded to third-party cloud services.
- Join multiple audio files into a single track — useful for podcasts, DJ sets and audiobook chapters. Re-encodes to MP3 to smooth over mixed formats, all locally.
- Running a quick one-off task — once loaded, most tools keep working even if the connection drops.
- Content creators, podcasters, video editors, and audio engineers who need to demux and extract audio/video streams directly on local CPU cores without installing software.
Frequently Asked Questions
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