Convert WMA to FLAC: Free Online Converter
Convert Windows Media Audio to Free Lossless Audio Codec online for free. Fast, secure audio conversion with no watermarks or registration.
WMAに対応
アップロードすることで、これらのファイルの権利を有していること、および利用規約に同意することを確認したものとみなされます。
変換設定: ファイルを追加すると調整できます
安全な転送
HTTPS暗号化アップロード
プライバシー優先
ゲストのファイルは約2時間で自動削除
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
WMA から FLAC への設定
- エンジン
- メディア
- 設定
- 調整できる設定: 11
- Trim Start
- Trim End
- Volume
- Fade In
- Fade Out
- Compression
- Sample Rate
- Channels
- Audio Channels
- Reverse Audio
- Strip Metadata
変換方法
アップロードエリアにドラッグするか、クリックして選択し、.wmaファイルをアップロードしてください。
必要に応じて出力設定を調整してください。デフォルト設定ではオリジナルの品質を維持します。
「変換」をクリックし、準備ができたら.flacファイルをダウンロードしてください。
WMAからFLACへの変換について
WMA encompasses three codec variants: WMA Standard (lossy, 32-320 kbps), WMA Pro (multichannel lossy), and WMA Lossless (bit-perfect compression). FLAC (Free Lossless Audio Codec) is the universal open-source lossless audio standard, supported natively on Android, Linux, Windows 10+, and most music streaming platforms. FLAC achieves 50-60% compression compared to raw PCM.
Converting WMA to FLAC moves your audio from Microsoft's proprietary ecosystem to the most widely supported open lossless format. For WMA Lossless sources, this is a perfect lossless-to-lossless transfer. For WMA Standard sources, FLAC preserves the decoded audio at its current quality level.
WMAをFLACに変換する理由
FLAC is the industry standard for lossless music distribution and archiving. Bandcamp, Tidal, Qobuz, Amazon Music HD, and Deezer HiFi all use FLAC. Converting WMA to FLAC future-proofs your music library in an open, patent-free format that will be supported indefinitely.
FLAC's metadata capabilities far exceed WMA's. Vorbis comment tags support virtually unlimited custom fields, embedded album art, ReplayGain values, and cue sheets. For music collectors migrating from Windows Media Player, FLAC provides a superior organizational framework.
主な活用例
- Migrating a WMA music library to the universal lossless FLAC standard
- Converting WMA Lossless collections to an open-source lossless format
- Preparing audio for lossless music distribution on Bandcamp or similar platforms
- Archiving WMA recordings in an open format immune to proprietary format abandonment
- Building a FLAC music server library for Plex, Roon, or Jellyfin
仕組み
FFmpeg demuxes the ASF container, decodes the WMA audio (Standard, Pro, or Lossless) to PCM, and encodes using the FLAC encoder. FLAC compression levels 0-8 trade encoding speed for file size without affecting quality. The encoder uses linear prediction and Rice coding to achieve lossless compression. The output preserves the source sample rate, bit depth, and channel layout. An MD5 checksum of the decoded audio is stored in the FLAC header for integrity verification.
品質とパフォーマンス
FLAC encoding is mathematically lossless. For WMA Lossless sources, the entire conversion is end-to-end lossless — the FLAC output is bit-for-bit equivalent to the original pre-compression audio. For WMA Standard sources, FLAC perfectly preserves the decoded lossy audio at whatever quality WMA retained. No additional quality loss occurs during FLAC encoding.
デバイス互換性
| Device | WMA | FLAC |
|---|---|---|
| Windows PC | Native | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Native |
| Linux | Partial | Native |
| Web Browser | No | No |
プラットフォーム別の推奨設定
Spotify
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Apple Music
Resolution: N/A
Bitrate: 256 kbps
AAC format required
SoundCloud
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Podcast
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
最良の結果を得るためのヒント
- 1Prioritize WMA Lossless files for conversion — they produce bit-perfect FLAC output with zero quality compromise
- 2Use FLAC compression level 5 for optimal speed/size balance — all levels produce identical audio quality
- 3Add ReplayGain tags during conversion for normalized playback volume across your library
- 4Embed album art in FLAC rather than relying on folder.jpg — this ensures artwork displays everywhere
- 5Verify the conversion of WMA Lossless sources by comparing MD5 checksums of the decoded PCM
関連する変換
WMA to FLAC migration moves your audio to the universal open lossless standard. WMA Lossless sources convert with zero quality loss, while WMA Standard sources are preserved at their full decoded fidelity.
WMAとFLACの比較
| 特徴 | WMA | FLAC |
|---|---|---|
| 正式名称 | Windows Media Audio | Free Lossless Audio Codec |
| 拡張子 | .wma | .flac |