How long is the file if I save it at 2x?

It is half as long. A 3-minute file becomes 1 minute 30 seconds.

The voice sounds higher after I changed the speed.

In this tool the pitch changes along with the speed. Faster sounds higher and slower sounds lower.

Which files can I open?

Audio files. The tool opens files whose sound the browser can read, such as MP3, WAV and M4A. If it can't be read, a message appears.

Change speed (Audio)

Change speed

Drop a file here

Make audio faster or slower. Files are processed on your device.

MP3·WAV·M4A·OGG·FLAC

How to use Change speed

What it does

Make audio faster or slower. Set the speed between 0.5x and 2x, and the length changes along with it. The file is processed on your device and is not uploaded.

Step by step

Drop an audio file onto the page, or click to choose one.
On the “Speed” tab, type a number into the “Speed” field or move the slider. You can also pick 0.5x, 0.75x, 1.25x, 1.5x or 2x with the buttons above it. The starting value is 1.25x.
Play the file to hear it at the chosen speed. “Result length” shows how long the saved file will be.
On the “Save” tab, choose WAV or MP3 under “Save format”. The default is WAV.
Click “Change speed”. When it finishes, use “Save” to download the file.

Good to know

Changing the speed also changes the pitch: faster sounds higher, slower sounds lower. This tool does not separate speed from pitch.
The result length is the original length divided by the speed. At 2x it is half as long; at 0.5x it is twice as long.
1x is the original speed. At 1x, “Change speed” can't be clicked.
Whatever the original format, the result is WAV or MP3. MP3 is saved at 192 kbps.
The first time you save as MP3, the converter (about 32 MB) is downloaded.
This tool opens audio files only. The file name is the original name followed by “-speed”, for example song-speed.wav.
Press Space to play and pause.

Frequently asked questions

How long is the file if I save it at 2x?: It is half as long. A 3-minute file becomes 1 minute 30 seconds.
The voice sounds higher after I changed the speed.: In this tool the pitch changes along with the speed. Faster sounds higher and slower sounds lower.
Which files can I open?: Audio files. The tool opens files whose sound the browser can read, such as MP3, WAV and M4A. If it can't be read, a message appears.