Convert QuickTime (.qt) to Free Lossless Audio Codec (.flac) online for free. Fast, secure video conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .mov 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 .flac file when it's ready.
FLAC (Free Lossless Audio Codec) is an open-source lossless compression format developed by the Xiph.Org Foundation. It typically compresses audio to 50-70% of the original PCM size while allowing perfect bit-for-bit reconstruction. Extracting audio from Apple's QuickTime container into FLAC preserves every detail of the original recording in the most widely supported open lossless format available.
QT files bundle video data you may not need with audio data you do. FLAC is the universal lossless standard — supported on Android, Linux, Windows (via native codec in Windows 10+), and all major media players. Unlike Apple's proprietary ALAC, FLAC is open-source and has the broadest cross-platform support of any lossless audio format.
FFmpeg decodes the QT audio stream and passes the raw PCM data to the FLAC encoder, which uses linear prediction and entropy coding to achieve lossless compression. The compression level (0-12) controls encoding speed versus file size — level 5 is the default, offering a good balance. Metadata including title, artist, and album are mapped to Vorbis Comment tags in the FLAC output.
FLAC is mathematically lossless — the decoded audio is identical bit-for-bit to the encoder input. If the QT source contains lossy audio (AAC, MP3), the FLAC output preserves exactly that quality level. There is no generation loss from the conversion process itself.
| Device | MOV | FLAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Native |
| Linux | Partial | Native |
| Web Browser | No |
Resolution: 1920x1080
Bitrate: 8-12 Mbps
H.264 recommended for fast processing
Resolution: 1080x1080
Bitrate: 3.5 Mbps
Square or 9:16 for Reels
Resolution: 1080x1920
Bitrate: 4 Mbps
9:16 vertical, under 60s ideal
Resolution: 1280x720
Bitrate: 5 Mbps
Under 140s, 512MB max
Resolution: 960x540
Bitrate: 2 Mbps
16MB limit for standard, 64MB for document
Resolution: 1280x720
Bitrate: 4 Mbps
8MB free, 50MB Nitro
QT to FLAC conversion liberates your audio from Apple's proprietary container into the most widely supported open lossless format. It's the gold standard for archival, cross-platform distribution, and professional audio workflows where quality cannot be compromised.
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 | MOV | FLAC |
|---|---|---|
| 正式名称 | Apple QuickTime Movie | Free Lossless Audio Codec |
| 拡張子 | .mov | .flac |
| 最適な用途 | High quality | Lossless compression |