Merge Audio Files Online — Free Audio Joiner

Upload multiple audio files, arrange the order, and download a single merged file.

How It Works

  1. 1Upload your file by dragging it into the drop zone or clicking to browse.
  2. 2Adjust the quality slider to balance file size and visual fidelity (optional).
  3. 3Click Download to save your converted file.

About Merge Audio

Need to combine multiple audio files into one? Upload your files (MP3, WAV, OGG, M4A, FLAC), drag to reorder them, and download a single merged file as MP3 or WAV. The tool decodes each file using the Web Audio API, resamples them to a consistent sample rate if needed, concatenates the AudioBuffers, and re-encodes the result. All processing happens in your browser — your audio files are never uploaded anywhere.

Frequently Asked Questions

Can I merge different audio formats?

Yes! You can mix MP3, WAV, OGG, M4A, FLAC, and other formats. Each file is decoded to raw audio before merging, so the input format doesn't matter.

Is my file uploaded to a server?

No. Transmute processes everything locally in your browser using JavaScript and the Canvas API. Your files never leave your device — there is no server, no upload, no cloud processing.

What if my files have different sample rates?

The tool automatically resamples all files to match the highest sample rate among your inputs, ensuring consistent quality throughout the merged output.

Can I reorder the files before merging?

Yes. After uploading, you can drag and drop the files to arrange them in the order you want before merging.

Is there a limit on how many files I can merge?

There is no fixed limit. However, since all processing happens in your browser, merging many large files may be slower on devices with limited memory.

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