Merge Audio Files Online — Free Audio Joiner

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

How It Works

1Upload two or more audio files by dragging them into the drop zone or clicking to browse.
2Drag the tracks to set the order they should play in.
3Click Download to save the merged audio file.

About Merge Audio

Need to combine multiple audio files into one? Whether you are assembling podcast segments, joining music tracks into a continuous mix, combining voice recording takes, or building an audio compilation, this tool merges multiple audio files seamlessly. Upload your files in any combination of formats — MP3, WAV, OGG, M4A, and FLAC are all supported, and you can mix different formats in the same merge. Drag to reorder them into the exact sequence you want, then download a single merged file as MP3 (compact, ideal for sharing) or WAV (lossless, ideal for further editing). The tool decodes each file using the Web Audio API, automatically resamples them to a consistent sample rate if the source files differ, concatenates the AudioBuffers in order, and re-encodes the result as a clean, continuous audio file. The transitions between files are seamless with no gaps or clicks.

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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.

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.

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.

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