FLAC → M4A
Convert FLAC to M4A (AAC) – locally in your browser
Why FLAC → M4A?
FLAC offers lossless quality but creates large files. M4A (AAC) is the best compromise for mobile devices and streaming – significantly smaller than FLAC but with very good sound quality at typical bitrates from 128 kbps.
Frequently Asked Questions
What is an M4A file?
M4A is an audio container format based on MPEG-4. It typically contains AAC-encoded audio with compact file size and good sound quality.
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 FLAC 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 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.
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.
Why convert FLAC → M4A?
FLAC (Free Lossless Audio Codec) compresses audio losslessly to typically 50-60% of WAV size with bit-perfect quality. It's ideal for archiving and HiFi playback, but files are still often too large for mobile use and streaming — a typical FLAC album is 300-500 MB. Converting to M4A creates a space-saving version (MP3, OGG) for mobile players, streaming, or email delivery, while keeping FLAC as the quality archive. M4A makes FLAC files practical for everyday use. M4A (AAC audio) offers better quality than MP3 at the same bitrate and is preferred by Apple devices and iTunes.