1
Upload an audio file
Choose or drop an audio file your browser can decode.
Audio Tools
Audio Speed Changer
Speed up or slow down an audio clip and export the result as a new file.
Upload an audio clip, choose a speed from 0.5x to 2x, preview it, and export the result as a new WAV file — entirely in your browser. Changing speed also changes pitch: faster audio sounds higher, slower audio sounds lower. Need to cut a clip down instead? Try Audio Trimmer.
Your audio is processed locally in your browser. It isn't uploaded to our servers.
Drag files here
or tap below to choose files from your device
Supports common audio formats your browser can decode (MP3, WAV, M4A, OGG, and more)Maximum 300.0 MB.
How it works
Private audio speed changing in your browser
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Choose a speed
Pick a preset from 0.5x to 2x, or type a custom value, then preview it.
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Change speed and download
Export the result as a WAV file and download it with a custom filename.
Use cases
When this comes in handy
Speed up a lecture or podcast
Get through a long recording faster by exporting it at 1.5x or 2x speed.
Slow down audio for practice
Study a fast passage of music or speech by slowing it down to half speed.
Match a clip to a video's pace
Speed up or slow down a voiceover or sound effect to fit a fixed-length video.
FAQ
Common questions
Is my audio uploaded anywhere?
No. Decoding, preview playback, speed processing, and export all happen locally in your browser.
Does changing speed also change pitch?
Yes. This tool changes speed the same way a native playback-speed control does — faster audio also sounds higher-pitched, and slower audio sounds lower-pitched. It doesn't do pitch-preserving time-stretching.
What speeds can I choose?
Anywhere from 0.5x (half speed) to 2x (double speed), using a preset button or a custom value.
Can I preview the speed before exporting?
Yes. Preview plays the clip at your selected speed before you export anything.
What audio formats can I upload?
Whatever your browser's built-in audio decoder supports — most browsers handle MP3, WAV, M4A, and OGG. If a file can't be decoded, you'll see a clear message rather than a silent failure.
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