WAV to MP3

Compress a WAV to MP3 at the bitrate you choose, in your browser.

Select an audio file

Your WAV is encoded to MP3 at the bitrate you pick — entirely in your browser.

點擊選擇，或將檔案拖曳至此

如何 WAV to MP3

1
Add the WAV
Drop in your WAV file — nothing is uploaded.
2
Choose a bitrate
Pick 128–320 kbps depending on the size/quality trade-off you want.
3
Download the MP3
Save the compressed MP3.

Which bitrate should I pick?+

192 kbps is a good default. Use 256–320 for music you care about, 128 for voice or when size matters most.

Is my file uploaded?+

No. The WAV is decoded and the MP3 encoded in your browser with a JavaScript port of the LAME encoder.

How much smaller will it be?+

Usually 8–12× smaller than the WAV, depending on the bitrate you choose.

Is any quality lost?+

MP3 is lossy, so yes — but at 192 kbps and above it's hard to hear on most material.

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。