Convert M4R to FLAC — Free Online Converter

FLAC (Free Lossless Audio Codec) is the open standard for lossless audio compression, supported by Android, Windows, Linux, and most streaming services. Converting iPhone ringtones from M4R to FLAC decodes the AAC audio and re-encodes it in FLAC's lossless compression, creating a file that can be converted to any other format in the future without additional quality loss.

Unlike ALAC (Apple's lossless codec), FLAC is universally supported across non-Apple platforms. Android plays FLAC natively, Windows 10 and later include a built-in FLAC decoder, and streaming services like Tidal and Amazon Music use FLAC for their lossless tiers. If you are moving your ringtone collection away from the Apple ecosystem, FLAC is the most portable lossless format available.

FLAC gives you a platform-neutral lossless archive of your ringtone audio. While the quality ceiling is set by the original AAC encoding in the M4R file, the FLAC output preserves the decoded audio without any additional compression artifacts. You can convert FLAC to any format later — MP3, OGG, WAV, AAC — with only one generation of lossy encoding, rather than the double lossy encoding you would get converting directly between lossy formats.

FLAC also supports rich metadata (Vorbis comments), including artist, title, album, genre, and embedded artwork. This makes it suitable for organizing a curated sound library where you want proper tagging. The metadata system is more flexible than M4R's limited tag support, letting you add detailed descriptions and categorizations to your audio clips.