Significantly smaller files.
ALAC is a lossless format that prioritizes fidelity over size. Converting to M4A introduces modern compression that typically reduces file size by an order of magnitude with no perceptible difference at normal playback or viewing.
為什麼要轉換
01
ALAC is a lossless format that prioritizes fidelity over size. Converting to M4A introduces modern compression that typically reduces file size by an order of magnitude with no perceptible difference at normal playback or viewing.
02
M4A is accepted by a wider range of audio players, car stereos, and streaming services than ALAC. The conversion removes a recurring compatibility friction without changing what the file actually contains.
03
M4A files are typically smaller than their ALAC 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 ALAC 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,M4A 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 |
|---|---|---|---|---|---|---|---|---|
| M4A | 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. |
Apple's lossless audio format inside an M4A container.
Typical uses
Apple Music lossless, iTunes lossless libraries.
An AAC-encoded audio file commonly produced by Apple devices and iTunes. Better quality than MP3 at similar sizes.
Typical uses
iTunes purchases, voice memos, modern music 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。ALAC 到 M4A 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,ALAC 到 M4A 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:
ALAC to M4A is processed in your browser with WebAssembly. No upload, no tracking, no limits. Your file never leaves your device.