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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.

點擊選擇，或將檔案拖曳至此

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 — 常見問題

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.

你們會把我的檔案上傳到伺服器嗎？+

不會——這裡的每個工具都完全在你的裝置上處理檔案，不會向伺服器上傳任何內容。唯一的例外是 AI 工具，它們會把擷取的文字（而非檔案本身）傳送給 Claude 來完成工作。

有檔案大小限制嗎？+

我們沒有人為設下限制，但由於處理過程在你的瀏覽器中進行，非常大的檔案（超過 500MB 或 1000 頁）會受你裝置記憶體的限制，而非我們的限制。