M4A → FLAC
Convert M4A to FLAC – locally in your browser
Why M4A → FLAC?
FLAC is the standard format for lossless music archives. If you want to archive M4A files long-term, FLAC is the best choice – lossless, open, and supported by all audio players.
Frequently Asked Questions
What is a FLAC file?
FLAC (Free Lossless Audio Codec) is a lossless audio format. It compresses audio without any quality loss – like a ZIP for music.
Are my files safe?
Yes, 100%. The conversion happens completely locally in your browser – your files are never uploaded to a server.
Can I convert multiple files at once?
Yes, you can upload and convert as many M4A files as you want at the same time.
Is the conversion free?
Yes, wandlio.de is completely free. No registration, no limits, no ads.
About FLAC
FLAC (Free Lossless Audio Codec) was developed by Josh Coalson in 2001 and is the most widely used format for lossless audio compression. FLAC files are about 50 to 60 percent smaller than uncompressed WAV files while preserving the original quality bit-for-bit. The format is patent-free, maintained by the Xiph.Org Foundation, and was published as RFC 7900 in 2014. FLAC supports sample rates up to 655 kHz, bit depths up to 32 bits, and up to 8 channels, embedded cuesheets for continuous album playback, ReplayGain volume adjustment, and Vorbis comments for metadata. The codec is supported by virtually all modern playback devices and software players, including Spotify, Apple Music, Tidal, and Amazon Music, which all offer FLAC for HiFi streaming. FLAC is the standard among audiophiles and music archives where no quality loss is acceptable. For everyday mobile use, converting to AAC or Opus is recommended since FLAC files at typical album sizes consume considerable storage.
About M4A
M4A (MPEG-4 Audio) is an audio container in MP4 format that typically contains the AAC codec (Advanced Audio Coding). AAC was developed in 1997 as the successor to MP3 within the MPEG-2 and MPEG-4 standards. Apple introduced M4A in 2003 with the iTunes Store and iPod as its standard format, making it dominant in the Apple ecosystem. AAC achieves better quality than MP3 at 128 kbps and supports HE-AAC for extremely low bitrates starting at 24 kbps, making it ideal for streaming and mobile networks. M4A supports metadata, chapter markers, and embedded cover art. The format is supported by iTunes, YouTube, Spotify, and nearly all mobile devices. The key difference from MP3 is that M4A is a container that can hold various codecs, while MP3 is simultaneously codec and container.
Why convert M4A → FLAC?
M4A (MPEG-4 Audio) contains AAC-encoded audio and offers better quality than MP3 at the same bitrate. It's preferred by Apple devices and iTunes but isn't universally supported — older Android devices, many car players, and certain Windows applications can't play M4A. Converting to FLAC creates a universally compatible version: MP3 for maximum compatibility, FLAC for lossless archiving, WAV for professional audio editing. FLAC closes compatibility gaps. FLAC offers lossless compression at half the WAV size — ideal for quality archiving and HiFi playback.