FLAC to AAC Converter — Free, Online, No Upload

FLAC is unbeatable for archiving and audiophile hardware, but it's not a distribution format. Streaming platforms, podcast hosts, broadcast delivery systems, smart TVs, and most consumer devices outside the Linux and audiophile world expect AAC or MP3. AAC is the more modern of the two — it achieves better quality at the same bitrate, and it's the codec used internally by Apple Music, Spotify, YouTube, and virtually every streaming platform.

Converting from FLAC to AAC is the standard step for anyone preparing audio for broad distribution. Apple Podcasts requires AAC or MP3; uploading AAC directly is accepted and often preferred. Spotify converts uploads to its internal streaming format, but AAC or MP3 uploads are the standard input. YouTube encodes uploaded audio to AAC for delivery. Smart TVs and home theatre receivers that can't read FLAC natively play AAC without issues. Android handles AAC natively across all versions.

Because FLAC is lossless, you're starting from the cleanest possible source for the AAC encode — there's no prior generation loss stacking up. At 192 kbps, the bitrate this converter uses, most listeners can't tell the AAC from the FLAC in a normal listening setup. The file will be roughly 85–90% smaller than the FLAC. AAC (.aac) differs from M4A (.m4a) only in the container — both use the same codec; choose M4A if your destination is iTunes or Apple devices.

Typical sizes (3-minute song): FLAC 20–40 MB → AAC 2–5 MB.

AAC output is encoded at 192 kbps.

Going from lossless FLAC to lossy AAC removes detail you cannot get back — keep the original if you may need it.