Convert FLAC to AAC.
Shrink lossless FLAC music into AAC for phones, Apple devices and apps where space matters.
Lossless at home, compact on the go
FLAC is ideal for an archive but large on a phone. AAC keeps the music sounding close to the original at a fraction of the size.
High-resolution sources
A 24-bit or 96 kHz FLAC keeps its sample rate in the AAC. For the widest playback support, a 44.1 or 48 kHz source is safest.
Size change
A CD-quality FLAC usually shrinks by five to eight times.
How it works
- 01
Upload your FLAC
Drop a file or pick one from your device. Private by default.
- 02
Encode with ffmpeg
ffmpeg decodes the FLAC and encodes AAC at about 128 kbps for stereo, at the original sample rate.
- 03
Download
Grab your AAC.
About 128 kbps AAC for stereo
Works with FLAC files that carry cover art
Private uploads, auto-deleted after 1 hour
No watermark, no signup to try
Open-source ffmpeg engine
FLAC to AAC: re-encoded
AAC is a compressed, lossy audio format, so this re-encodes the sound and the file gets smaller. Every lossy re-encode sheds a little quality, so convert from the best source you have rather than chaining conversions.
Need more than a conversion?
Send your audio or video to TranscriptAI to generate a transcript, summary, structured notes, flashcards, quiz questions or action items: automatically.
Common questions
Is it free?+
Yes. Convert FLAC to AAC free. No signup and no watermark. Free covers 10 server conversions a day, up to 100 MB a file. Pro removes the daily limit and raises the file limit to 2 GB.
Is my file private?+
Your file is uploaded to a private bucket, converted on our own engine, and auto-deleted after 1 hour. It is never sent to a third-party converter.
Are tags and cover art kept?+
No. A raw .aac file has no room for tags or cover art, so the audio converts and the artwork is left out. For a file that keeps the title and artist, use FLAC to MP3.
How much quality is lost?+
AAC is lossy, so some detail is removed. At about 128 kbps for stereo it sounds close to the FLAC for everyday listening. Keep the FLAC as your master copy.
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