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Change Audio Speed

Speed up or slow down an audio file, 0.5× to 2× — in your browser.

Select an audio file

Speed up or slow down an audio file — 0.5× to 2×. Pitch changes with speed. Runs in your browser.

点击选择，或将文件拖到此处

如何 Change Audio Speed

  1. 1

    Add your audio

    Drop in the file.

  2. 2

    Set the speed

    0.5× to 2×. Pitch changes with speed.

  3. 3

    Apply and download

    Click Change speed and save the result.

Related PDF tools

Fade In / Fade Out AudionewAdd a smooth fade-in and fade-out to an audio file — in your browser.Vocal RemovernewRemove centre-panned vocals from a song for a karaoke track — in your browser.Trim AudionewCut an audio file to just the part you want, with a visual waveform.Change Video SpeednewSpeed up or slow down a video, 0.25× to 4× — in your browser.

Change Audio Speed — 常见问题

Does the pitch change?+

Yes. This resamples the audio, so faster playback raises the pitch and slower lowers it — no time-stretch.

How far can I go?+

0.5× to 2×.

Is my file uploaded?+

No. It's processed in your browser.

What format do I get?+

MP3 or WAV.

你们会把我的文件上传到服务器吗？+

不会——这里的每个工具都完全在你的设备上处理文件，不会向服务器上传任何内容。唯一的例外是 AI 工具，它们会把提取的文本（而非文件本身）发送给 Claude 来完成工作。

有文件大小限制吗？+

我们没有人为设置限制，但由于处理过程在你的浏览器中进行，非常大的文件（超过 500MB 或 1000 页）会受到你设备内存的限制，而非我们的限制。