Compress FLAC to AAC

Need smaller audio files? Converting FLAC to AAC dramatically reduces file size. A 50MB file becomes 5MB. Perfect for email, sharing, and storage.

FLACAAC

Drop your FLAC file here or click to browse

FLAC (.flac) · Max 20 MB

FLAC files are uncompressed and huge. AAC uses lossy compression to shrink them by 90% or more. The size reduction is significant for sharing, uploading, and storage.

For email attachments, 128-192kbps works well. For music sharing, use 256-320kbps. AudioUtils lets you drop your file and convert instantly. No upload to a server, no waiting.

Storage-wise you're looking at about 4× less: 5 MB per minute becomes roughly 1.2. Single clean encode from a full-quality source — the best-case scenario for a lossy format, with no inherited artifacts.

Where does a FLAC file even come from? Usually CD rips, hi-res download stores, and archival libraries. The catch is that FLAC is lossless but poorly supported outside audiophile software — Apple's Music app won't touch it. AAC is the destination because it plays essentially everywhere — HLS streaming segments and every ordinary phone, browser, and player. The size drop is the point — around 4× less data, which is what turns an unsendable file into an attachment. Because FLAC is lossless, encoding to AAC here is the clean, single-generation case — the encoder sees the whole original signal, so this AAC is as good as the format gets.

Frequently Asked Questions

How much smaller will the file get?

Storage-wise you're looking at about 4× less: 5 MB per minute becomes roughly 1.2.

What bitrate keeps the quality acceptable?

192–256 kbps is transparent for most music, 128 kbps is fine for speech, and 64–96 kbps mono is plenty for pure voice — halving the size again with no real cost. Below that you start hearing it.

Will compressing damage the audio?

Single clean encode from a full-quality source — the best-case scenario for a lossy format, with no inherited artifacts.

Should I compress a master or an archive copy?

Never the master. Compress a copy for sharing and listening, and keep the original — you can always re-encode from it, but you can never re-create what a lossy encoder discarded.

Is this compressor free?

Yes. Free users get 5 conversions per month. The output is limited to the first 10 seconds as a preview, with a 20MB input file size limit. Upgrade to Pro for unlimited, full-length conversions.