FLAC 转 M4A - 在线免费转换
在浏览器里直接把 .flac 转成 .m4a。文件不上传，免登录，转完即下载。
What is FLAC?
Free Lossless Audio Codec (.flac) — FLAC is an open-source lossless audio codec. It compresses audio without losing any quality, resulting in files about 50-60% the size of WAV while preserving every detail.
What is M4A?
MPEG-4 Audio (.m4a) — M4A is an audio-only MPEG-4 container, typically containing AAC-encoded audio. It is Apple's preferred audio format and supports both lossy and lossless compression (Apple Lossless).
FLAC vs M4A
| Feature | FLAC | M4A |
|---|---|---|
| Full Name | Free Lossless Audio Codec | MPEG-4 Audio |
| Compression | Lossless | Lossy |
| Typical Bitrate | 600-1,000 kbps | 128-256 kbps |
| Best For | Audiophile music collections, archiving, high-fidelity playback | Apple Music, iTunes, iPhone/iPad audio |
| File Extension | .flac | .m4a |
Frequently Asked Questions
Is converting FLAC to M4A free?
Yes, completely free. The conversion runs entirely in your browser using WebAssembly — your files never leave your device and no sign-up is required.
Will I lose audio quality converting FLAC to M4A?
Converting from lossless FLAC to lossy M4A will result in some quality loss due to compression. For best results, use a higher bitrate setting.
What is the maximum file size?
You can convert audio files up to 100MB. Since the conversion happens in your browser, processing speed depends on your device's performance.
Is my audio file uploaded to a server?
No. All format conversion is processed locally in your browser using FFmpeg WebAssembly. Your files never leave your device, ensuring complete privacy.