Audio Joiner (Merge MP3)

Join several audio files into one track, in order, with optional silence between them.

How do I combine audio files into one?

Select the audio files in the order they should play, choose an optional gap of silence, and press Join audio. The files are decoded, matched to the same sample rate and channel count, and joined into one MP3 or WAV.

Tips

Name files 01, 02, 03… to control the order easily.
A 0.5–1 second gap separates songs or chapters; 0 joins them seamlessly.
Files with different sample rates or mono/stereo are converted automatically.

Frequently asked questions

Can I mix MP3 and WAV?

Yes, any formats your browser can decode can be joined.

Is the audio uploaded?

No, joining happens on your device.

How many files can I join?

As many as your device memory allows — dozens of songs is fine.