Audio Speed Changer
Speed up or slow down your audio files from 0.25x to 4.0x. Type or slide speed, preview in real-time, and download your modified audio file.
Drag & Drop your audio file here
Supports MP3, WAV, M4A, AAC, OGG, WebM, FLAC
audio.mp3
0.0 MB • 0:00
x
0.25x (Slower)
1.0x (Normal)
4.0x (Faster)
Original Duration
0:00
Adjusted Duration
0:00
Time Difference
0s
Preview updates live with selected speed
Processing audio file...
About Audio Speed Changer
The Audio Speed Changer tool allows you to speed up or slow down podcasts, music tracks, voice notes, lectures, and audiobooks directly in your web browser. All processing is executed locally using Web Audio technology — your audio files are never uploaded to any server.
Features
- Flexible Controls: Adjust speed by dragging the range slider or typing exact values (e.g. 1.15x).
- Pitch Preservation: Enable time-stretching to speed up or slow down voice without high-pitched chipmunk or low-pitched slowed effects.
- Instant Preview: Listen to the modified audio playback in real time before exporting.
- High Quality Export: Download uncompressed 16-bit PCM WAV audio for maximum fidelity.
How to Change Audio Speed
- Upload your audio file by clicking "Choose File" or dragging it into the dropzone.
- Set your desired speed between 0.25x and 4.0x using the slider or text box.
- Check "Preserve Pitch" to maintain natural vocal tones, or uncheck it for classic pitch-shifting speed effects.
- Click the Play button on the preview player to verify your settings.
- Click Download Modified Audio to save the exported audio file.