Yes, it's completely free and no sign-up is required.

Are my files uploaded to a server?

No. Audio speed runs in your browser: your files and data never leave your device.

Does it work on my phone?

Yes. It works in the browser on phones, tablets and computers, with nothing to install.

Audio speed

Change the playback speed of an audio file.

Audio Processed on your device

You upload

audiolibro.mp31×

You download

audiolibro-1.5x.mp31,5×

Was this tool helpful?

Is Audio speed free?: Yes, it's completely free and no sign-up is required.
Are my files uploaded to a server?: No. Audio speed runs in your browser: your files and data never leave your device.
What formats does Audio speed accept?: Accepts: MP3, WAV, OGG, M4A.
Does it work on my phone?: Yes. It works in the browser on phones, tablets and computers, with nothing to install.