# Speed Up or Slow Down Audio

> Speed up or slow down audio files with optional pitch preservation. Supports MP3, WAV, AAC.

Live tool: https://lofttools.com/tools/media-tools/audio-speed-changer

Category: Video & Audio

## How it works

1. **Select audio** — Drag and drop your audio file or click to browse
2. **Set speed** — Adjust playback speed from 0.25x to 4x with optional pitch preservation
3. **Download** — Get your speed-adjusted audio file

## FAQ

### Does changing speed affect the pitch?

By default, pitch is preserved when changing speed. You can optionally allow natural pitch change.

### What speed range is available?

From 0.25x (4x slower) to 4x (4x faster) with fine-grained control.

### What is the maximum file size?

There is no server limit since processing happens locally. Your device's memory is the only constraint — most handle files up to 100MB.

## Privacy

This tool runs entirely in the browser. Files are not uploaded to a server. They never leave the user's device.

## More

- All tools: https://lofttools.com/tools
- Category: https://lofttools.com/tools/media-tools
- LLM index: https://lofttools.com/llms.txt