Lossless baseline for further work.
ALAC preserves every detail of the source AAC, which prevents additional quality loss during subsequent edits or re-encoding. The original AAC compression cannot be undone, but no new artifacts will be introduced.
為什麼要轉換
01
ALAC preserves every detail of the source AAC, which prevents additional quality loss during subsequent edits or re-encoding. The original AAC compression cannot be undone, but no new artifacts will be introduced.
02
ALAC is accepted by a wider range of audio players, car stereos, and streaming services than AAC. The conversion removes a recurring compatibility friction without changing what the file actually contains.
03
ALAC files are typically smaller than their AAC counterparts, which reduces hosting, transfer, and storage costs at scale. The savings compound when serving the same content to many recipients.
在任何現代瀏覽器中造訪本頁 —— 無需安裝、無需註冊、無需外掛。
將 AAC 檔案拖入放置區,或點擊從你的裝置中選取。
轉換完全在你的瀏覽器中進行。完成後,ALAC 檔案會自動下載至你的裝置。
品質與保真度
格式規格
相容性
| 平台 | Windows | macOS | iOS | Android | Chrome | Firefox | Safari | Edge |
|---|---|---|---|---|---|---|---|---|
| AAC | 原生 | 原生 | 原生 | 原生 | 原生 | 原生 | 原生 | 原生 |
為什麼選 LocalConvert
| Category | LocalConvert | 雲端轉換器 |
|---|---|---|
| 隱私 | Files never leave your device. The whole pipeline runs in your browser via WebAssembly. | Files travel to a remote server, sit in queue storage, and may be retained for analytics or moderation. |
| 費用 | Free, no signup, no daily quotas. | Often free for small files; paid tiers for batch / large / commercial use. |
| 限制 | Limited only by your device's memory and CPU. Uncompressed WAV stems handled comfortably on desktop. | Typical 100 MB to 1 GB per-file caps, plus rate limits. |
The successor to MP3 with superior quality per bit. Used widely in streaming and modern audio.
Typical uses
YouTube, Apple Music, streaming services.
Apple's lossless audio format inside an M4A container.
Typical uses
Apple Music lossless, iTunes lossless libraries.
是的。LocalConvert 完全免費,無需註冊,也沒有每檔案或每日的限制。
不會。AAC 到 ALAC 的轉換完全在你的瀏覽器內透過 WebAssembly 完成 —— 你的檔案永遠不會離開你的裝置。
沒有固定上限 —— 實際限制取決於你裝置的可用記憶體。在低記憶體裝置上,非常大的檔案可能耗時較久或失敗。
可以 —— 頁面載入後,AAC 到 ALAC 的轉換無需網路連線即可運作。重新開啟頁面一次即可快取。
LocalConvert 使用業界標準工具(FFmpeg、ImageMagick、Pandoc)—— 品質與專業人員在命令列中使用的相當。有損格式每次重新編碼仍會損失一些品質。
Last verified:
AAC to ALAC is processed in your browser with WebAssembly. No upload, no tracking, no limits. Your file never leaves your device.