Does changing speed also change the pitch?

Yes. This tool uses a simple resample approach, so speeding up audio also raises the pitch and slowing it down lowers the pitch. If you want to change pitch independently, use the Pitch Changer tool.

What is the difference between this and a pitch changer?

This tool changes both speed and pitch together. The Pitch Changer tool shifts pitch while keeping the duration constant, using a stretch-and-resample algorithm.

How does the output duration change?

The output duration equals the original duration divided by the speed multiplier. For example, a 10-minute recording at 2× becomes 5 minutes.

Is this good for podcasts or lectures?

Yes. Listening at 1.5× or 2× is a popular way to consume long-form audio content faster. The slight pitch increase is usually acceptable for speech.

Is my audio uploaded to a server?

No. All processing happens locally in your browser using the Web Audio API. Your file never leaves your device.

Audio Speed Changer — Speed Up or Slow Down Audio Online | Toolivon

Audio Speed Changer — 0.25× to 4×

Change the playback speed of any audio file. Choose from preset speeds.

Your audio never leaves your browser. All processing uses the Web Audio API locally.

Drop an audio file to change speed

or click to browse — MP3, WAV, OGG, AAC, FLAC, M4A

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How to Use

1
Upload your audio file
Click 'Choose File' or drag and drop your audio onto the upload area.
2
Select a speed preset
Choose from 0.25×, 0.5×, 0.75×, 1×, 1.25×, 1.5×, 2×, 3×, or 4×. Values below 1× slow the audio down; above 1× speed it up.
3
See the output duration
The estimated output duration updates automatically so you know how long the result will be.
4
Click Change Speed
Hit the Change Speed button. The tool resamples the audio at the new rate in your browser.
5
Download the result
Click Download to save the speed-adjusted audio as a WAV file.

Frequently Asked Questions

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