Convert WebM Video (.webm) 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 .webm 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.
WebM files contain audio encoded as Opus or Vorbis — both excellent lossy codecs from the open-source ecosystem. FLAC (Free Lossless Audio Codec) is the universal open-source lossless standard, also from Xiph.org (the same organization behind Vorbis). FLAC compresses PCM to 50-60% size with zero data loss and plays on virtually every device and platform.
Extracting WebM audio to FLAC creates a lossless archival copy in the universal open-source format. While the source is lossy, the FLAC output serves as a master copy from which any future format can be derived without cascading generation losses. FLAC is the standard for lossless audio across Android, Windows, Linux, and all major streaming services.
This extraction keeps everything in the open-source ecosystem — WebM's Opus/Vorbis decoded losslessly into Xiph.org's FLAC format.
FFmpeg extracts Opus or Vorbis from the WebM container, decodes to raw PCM, and encodes using the FLAC encoder. Compression levels 0-8 control speed vs size (level 5 default). Output is typically 16-bit/48 kHz for Opus sources or 16-bit/44.1 kHz for Vorbis sources. FLAC uses Vorbis comment metadata for tagging.
FLAC losslessly preserves every decoded sample. The quality ceiling is the original Opus/Vorbis encoding — FLAC cannot improve on it but ensures no further degradation.
| Device | WebM | FLAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Native |
| Linux | Partial | Native |
| Web Browser | Native |
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
WebM to FLAC extraction keeps audio in the open-source ecosystem while providing lossless archival quality for future use.
Безопасная передача
Загрузки зашифрованы по HTTPS
Конфиденциальность прежде всего
Файлы автоматически удаляются после обработки
Без регистрации
Начните конвертировать мгновенно
Работает везде
| No |
8MB free, 50MB Nitro
Любой браузер, любое устройство
| Характеристика | WebM | FLAC |
|---|---|---|
| Полное название | WebM Video | Free Lossless Audio Codec |
| Расширение | .webm | .flac |
| Лучше всего подходит для | Web optimized | Lossless compression |