Audio Speed
Speed up or slow down audio with real-time preview, pitch preservation, and waveform display.
Free & unlimited
All processing happens in your browser. No data is sent to any server.
About this tool
- 1
Upload Audio
Select an audio file to adjust the playback speed.
- 2
Set Speed
Use the slider or input field to set the speed multiplier (e.g., 1.5x for 50% faster).
- 3
Choose Pitch Mode
Decide whether to preserve the original pitch or let it shift naturally with the speed change.
- 4
Export
Download the speed-adjusted file in your chosen output format.
- Use 1.25x-1.5x for speeding up podcasts or lectures without losing clarity.
- Slowing audio to 0.75x is helpful for transcribing fast speech or learning music parts.
- Enable pitch preservation to keep voices sounding natural at different speeds.
- Speed values between 0.5x and 2.0x generally produce the best quality results.
- Adjustable speed from 0.25x to 4.0x playback rate
- Optional pitch preservation to keep natural tone at any speed
- Real-time preview of speed-adjusted audio
- Precise speed input with decimal values for exact control
- Maintains audio quality using high-grade resampling
- Speeding up lecture recordings for faster studying
- Slowing down music passages to learn complex instrumental parts
- Creating slow-motion audio effects for video production
- Adjusting audiobook playback to a comfortable listening speed
By default, pitch is preserved so voices sound natural. You can disable pitch preservation if you want the classic chipmunk (faster) or deep (slower) effect.
This tool adjusts the entire file uniformly. Use the Audio Trim tool first to isolate a section, then apply the speed change.
You can set speed up to 4.0x, though values above 2.0x may reduce speech intelligibility depending on the content.