Audio Speed Changer

Speed up or slow down any track. Drag the speed slider or tap a preset, keep the pitch natural if you want, then export as MP3 or WAV. Handy for fast-listening a lecture or slowing a song down to learn a part.

Read the guide: How to Change Audio Speed Online
Drop an audio file here, or

How it works

  1. 1

    Add an audio file

    Drop in an MP3, WAV, OGG or M4A file to see its waveform.

  2. 2

    Set the speed

    Drag the slider or pick a preset like 0.75× or 1.5×. Turn on pitch lock to keep voices natural.

  3. 3

    Export the result

    Preview the change, then save the new file as MP3 or WAV.

Instant & 100% private — nothing is uploaded

Everything runs locally in your browser. Your files are processed on your own device and are never sent to a server, so there are no upload waits, no size limits from us, and nothing is ever stored or logged.

Frequently asked questions

How do I change the speed of an audio file?
Add the file, drag the speed slider above or below 1× (or tap a preset), and download. Above 1× makes it faster and shorter; below 1× makes it slower and longer. Preview before you save.
Can I speed it up without making it sound like a chipmunk?
Yes. Switch on the keep-pitch option and the voice or music stays at its normal pitch while only the speed changes. Leave it off for the classic tape-style effect where faster also means higher.
What speeds can I use?
Anywhere from half speed up to double speed, in small steps, with one-tap presets for the common ones. Slowing a song to 0.5× is great for learning a riff; speeding a lecture to 1.5× saves time.
Is it really free, and is there a watermark?
It is free and there is no watermark, no sign-up and no email wall. You get the full-quality file straight back, with nothing added and nothing held behind a paywall.
Is my file uploaded to a server?
No. Everything runs locally in your browser. Your file is read and processed on your own device, nothing is uploaded, and nothing is logged or stored.

More tools

Online Audio EditorFull waveform editor: cut, fade, amplify and apply effects.Trim Audio OnlineSet in and out points on a waveform and export MP3 or WAV.Merge Audio FilesJoin several tracks into one, in the order you choose.Change Audio VolumeAmplify, lower or normalize loudness, then export.Audio ConverterConvert between MP3, WAV, OGG and M4A.Extract Audio from VideoPull the soundtrack out of a video as MP3 or WAV.

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