Convert Free Lossless Audio Codec (.flac) to Apple Lossless Audio Codec (.alac) online for free. Fast, secure audio conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .flac file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .m4a file when it's ready.
ALAC (Apple Lossless Audio Codec) is Apple's answer to FLAC — a lossless codec that compresses audio to about 50-60% of the original size, just like FLAC, but wrapped in an M4A container that Apple devices understand natively. Converting FLAC to ALAC gives you lossless audio that plays directly on every iPhone, iPad, iPod, Apple TV, and HomePod without installing any third-party software. Apple open-sourced ALAC's reference encoder in 2011, but the format remains primarily associated with the Apple ecosystem.
iPhones and iPads do not play FLAC files natively through the Music app — you need a third-party player like VLC. ALAC provides identical lossless quality in a format that Apple's entire hardware and software stack supports out of the box. iTunes, Apple Music, and the Music app all handle ALAC with full metadata display, gapless playback, and AirPlay streaming. If you maintain a lossless music library and use Apple devices, ALAC is the only lossless format that works everywhere in the ecosystem without compromise.
FFmpeg decodes the FLAC bitstream to PCM and re-encodes with Apple's ALAC codec into an M4A (MPEG-4 Audio) container. Both FLAC and ALAC use linear prediction and Rice coding, achieving nearly identical compression ratios. ALAC supports up to 32-bit depth at 384 kHz, as well as multichannel (up to 7.1). The M4A container provides iTunes-compatible metadata atoms for tags, artwork, lyrics, and chapter markers.
Absolutely zero quality loss. Both FLAC and ALAC are lossless — the decoded PCM output from either format is bit-for-bit identical to the original. The only differences are container format (Ogg/native FLAC vs. M4A), metadata system (Vorbis comments vs. iTunes atoms), and marginal compression efficiency variations (FLAC is typically 1-3% smaller).
| Device | FLAC | ALAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Native | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
FLAC to ALAC is the go-to conversion for audiophiles in the Apple ecosystem. You sacrifice a tiny amount of storage efficiency compared to FLAC, but gain seamless playback across every Apple device you own.
安全な転送
HTTPS暗号化アップロード
プライバシー優先
処理後にファイルを自動削除
登録不要
すぐに変換を開始
どこでも動作
あらゆるブラウザ、あらゆるデバイス
| No |
| 特徴 | FLAC | ALAC |
|---|---|---|
| 正式名称 | Free Lossless Audio Codec | Apple Lossless Audio Codec |
| 拡張子 | .flac | .m4a |
| 最適な用途 | Lossless compression | Lossless |