Free Online Audio Speed Changer

Change the speed of any audio file. Slow down or speed up music, podcasts, and more.

0.25x to 4x Speed
Pitch Lock
WAV Export

Drop Audio Here

Speed

100%

Pitch Shift

+0 semi

Bass Boost

0 dB

Save Modified Audio

Audio Speed Changer FAQ

Everything you need to know about changing the speed of audio files.

How do I change the speed of an audio file?

Upload your audio file, adjust the Speed slider to your desired rate, and click Export WAV to download the modified file. You can also fine-tune pitch and bass independently.

Can I slow down music without changing the pitch?

Yes, our speed changer uses time-stretching technology to adjust speed independently of pitch. Leave the Pitch Shift slider at 0 and only adjust the Speed slider to slow down or speed up without altering the pitch.

What's the maximum speed?

You can adjust from 0.25x (quarter speed) all the way to 4x (quadruple speed). This wide range is perfect for slowing down fast passages to learn them, or speeding up podcasts and lectures for faster listening.

Is this audio speed changer free?

Yes! Our audio speed changer is 100% free. All processing happens in your browser — your files are never uploaded to any server.

How to Change Audio Speed Online

Whether you're learning a complex guitar solo, transcribing a fast lecture, practicing along with a backing track, or creating unique content, our free audio speed changer makes it easy. Slow audio down to catch every detail, or speed it up for efficient listening — all without affecting pitch.

Upload any MP3 or WAV file, dial in your target speed from 0.25x to 4x, and export a high-quality WAV. Use the built-in trimmer to isolate the exact section you need.

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