MP3 Joiner Online
Merge multiple audio files into one — combine MP3s and other formats in your browser.
Drop audio files here or click to browse
MP3, WAV, OGG, FLAC, AAC, M4A
All processing happens in your browser. No files are uploaded.
What Is MP3 Joining?
MP3 Joiner is a free online tool that merge multiple audio files into one — combine MP3s and other formats in your browser. No files are uploaded — everything is processed locally on your device.
Merge MP3 files online free with this browser-based tool that combines multiple audio files into a single continuous track. This is useful for creating playlists, assembling podcast episodes from segments, combining audiobook chapters, or joining voice recordings. It uses FFmpeg WebAssembly to merge audio files locally on your device. Files are concatenated in the order you specify, and the result is a single audio file. No files are uploaded to any server.
Privacy guarantee: MP3 Joiner processes all files directly in your browser using WebAssembly. No data is uploaded to any server, no information is collected, and the tool works offline after loading. Unlimited usage with no signup, no watermarks, and no file size limits.
How to Use MP3 Joiner
Upload audio files
Select multiple audio files from your device. MP3, WAV, OGG, and other formats are supported.
Arrange the order
Reorder the files using the up/down buttons to set the playback sequence.
Merge and download
Click Merge to combine all files into one, then download the result.
Why Use Our MP3 Joiner?
Frequently Asked Questions
Can I merge audio files in different formats?
Yes. The joiner can combine files in different formats (e.g., MP3 + WAV). All files are re-encoded to a common format during the merge process.
Is there a limit on how many files I can merge?
There is no hard limit. The practical ceiling depends on your device memory. Most users merge 10-20 files without issues.
Will there be gaps between the merged tracks?
No. The files are concatenated seamlessly without any gaps, silence, or clicks between them.
What format is the merged output?
The merged file is output as MP3 by default, which provides universal compatibility across all devices and players.
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