FLAC to AAC Converter

Convert FLAC lossless audio into AAC — Apple's native lossy format. Smaller than MP3 at equivalent quality, perfect for iTunes, iPhone, and any Apple-ecosystem playback.

FLACAAC

Drop your FLAC file here or click to browse

FLAC (.flac) · Max 20 MB

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What is FLAC?

Lossless compression. Perfect quality at roughly half the size of WAV. The choice for audiophiles and archiving.

What is AAC?

Advanced Audio Coding. Successor to MP3 with improved compression. Widely used in streaming services.

Why Convert FLAC to AAC?

FLAC is the right format for archives — lossless, metadata-rich, supported by serious music players and DAWs. It's the wrong format for portable Apple devices: iPhone supports FLAC awkwardly through the Files app but not Apple Music sync, and iTunes won't import FLAC at all. AAC is the Apple-native lossy format and the right derivative for portable playback. AAC is also more efficient than MP3 — at 192 kbps, AAC sounds noticeably better than MP3 at the same bitrate, and at 256 kbps it's near-transparent for most material. Converting your FLAC archive to AAC for portable use is the standard workflow: keep the FLAC as the master, transcode to AAC for the iPhone. Quality from a FLAC source is excellent because the encoder has clean lossless audio to work with — no compounded artifacts, just one clean lossy pass. Pick 256 kbps for archival-quality AAC (matches Apple Music streaming). Pick 192 kbps for everyday music libraries. Pick 128 kbps for voice and audiobooks.

Who Uses This Converter

iPhone & iPad sync

FLAC doesn't sync via Apple Music. Convert to 256 kbps AAC and your library moves to your phone with a fraction of the storage cost.

iTunes library

iTunes refuses FLAC entirely. AAC imports natively and integrates with playlists, ratings, and Apple Music sync.

Apple Music match-ready

Apple Music's iCloud Library matches AAC files to its catalog at 256 kbps. Convert once and unlock cross-device library sync.

Frequently Asked Questions

What AAC bitrate should I use from FLAC?

256 kbps (VBR or CBR) for archival-quality AAC — matches Apple Music's stream rate, near-transparent on almost any music. 192 kbps is the everyday sweet spot — small files, excellent quality, suitable for the bulk of music libraries. 128 kbps for voice content and audiobooks. AAC is more efficient than MP3, so 192 kbps AAC sounds about as good as 256 kbps MP3.

Will the AAC sync to my iPhone via Apple Music?

Yes. AAC files (in M4A containers) sync through Apple Music / iCloud Music Library to iPhone, iPad, Apple Watch, and Apple TV. FLAC does not sync this way. Conversion to AAC is the standard step for getting a FLAC library onto Apple devices.

Is the output a .aac or .m4a file?

Our output uses the M4A container (AAC inside MP4) with the .m4a extension — this is what iTunes, Apple Music, and iPhone expect. The audio inside is identical to a raw .aac stream; only the wrapper differs.

How much smaller will the AAC be?

Roughly 80–85% smaller than the FLAC source for typical music. A 40 MB FLAC track becomes a 6–8 MB AAC at 256 kbps, or 4–5 MB at 192 kbps. Hi-res FLAC (24-bit / 96 kHz) shrinks even more dramatically since AAC operates at 16-bit / 48 kHz.

Will metadata transfer?

Common tags (title, artist, album, year, genre, track number) transfer cleanly from FLAC's Vorbis comments to M4A's iTunes-style atoms. Album art transfers. Some specialised tags (composer, conductor, BPM) may need re-tagging in iTunes or MusicBrainz Picard for curated libraries.

Should I use ALAC instead of AAC?

If you want to keep the lossless quality on Apple devices, use ALAC (Apple Lossless), not AAC — same quality as FLAC but Apple-native. Use AAC only when file size matters more than absolute quality (which is true for portable playback on most listeners).