Convert Flash Video (.flv) 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 .flv 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.
FLV audio is typically MP3 at 44.1 kHz or AAC-LC — both lossy compression formats. FLAC (Free Lossless Audio Codec) is an open-source lossless audio codec developed by Josh Coalson in 2001. FLAC compresses PCM audio to 50-70% of its original size without any data loss, and it is supported natively on Android, Linux, and in all major streaming services including Spotify and Tidal for high-fidelity delivery. Converting FLV to FLAC captures the decoded audio in a lossless, open-standard format.
FLAC provides lossless audio archiving that is universally supported outside the Apple ecosystem. Unlike AAC or MP3 extraction that would re-compress already compressed audio, FLAC preserves the exact decoded waveform. If you plan to edit, remix, or process the audio later, FLAC ensures no cumulative generation loss from repeated processing cycles.
FFmpeg decodes the FLV audio stream to PCM, then encodes to FLAC using the reference libFLAC encoder. FLAC uses linear prediction, residual coding, and Rice entropy coding to achieve lossless compression. Compression levels 0-8 control the encode speed vs. file size tradeoff (level 5 is default, level 8 is slowest but smallest). Output supports up to 32-bit depth and 655 kHz sample rate, with MD5 checksums embedded for integrity verification.
FLAC is mathematically lossless — decoded FLAC is bit-identical to the input PCM. The quality ceiling is determined by the FLV source encoding. A 128 kbps MP3 in an FLV produces the same audible quality in FLAC, but without risk of further degradation through additional lossy encoding. The embedded MD5 checksum lets you verify data integrity at any time.
| Device | FLV | 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
FLV to FLAC conversion gives you lossless, open-source audio archiving from legacy Flash content. The files are smaller than uncompressed WAV, universally supported, and immune to the cumulative degradation that comes from re-encoding in lossy formats.
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| No |
| الميزة | FLV | FLAC |
|---|---|---|
| الاسم الكامل | Flash Video | Free Lossless Audio Codec |
| الامتداد | .flv | .flac |
| الأفضل لـ | Small file size | Lossless compression |