Which formats can I combine?

Any audio your browser can decode; the files are re-encoded to a single MP3.

Can I reorder tracks?

Yes, use the up/down controls before merging.

Join multiple audio files into one track.

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Combine several audio files end-to-end into a single MP3. Reorder them before merging. Everything is processed on your device.

Open the Merge Audio tool and add your file. It's processed in your browser, never uploaded.
Adjust the available options to get the result you want.
Download the result. There's no sign-up, no watermark, and no size cap.

Which formats can I combine?: Any audio your browser can decode; the files are re-encoded to a single MP3.
Can I reorder tracks?: Yes, use the up/down controls before merging.

Other private, in-browser tools you might need.

Cut a section out of an audio file, quick and lossless.

Speed up or slow down audio without changing pitch too much.

Make an audio file louder or quieter.

Play an audio file backwards.