FLAC to AAC Audio Converter
Drop your FLAC files — the AAC audio is generated in your browser in seconds. Multiple files at once, no upload on the fast path.
9,214+ audio files converted
This tool turns your audio into AAC entirely in the browser. Advanced Audio Coding. Lossy successor to MP3 with better quality at the same bitrate. The default for Apple, YouTube, and most streaming. You can convert several files at once, and because the fast path is local there is no upload step and nothing to clean up afterwards.
Looking to programmatically convert FLAC to AAC?
Same engine, available as a JSON API. Drop a file or URL via REST and get the converted audio back — no browser, no UI, no rate limits on paid tiers.
Fast response on common audio pairs
Webhook delivery for batch jobs
Dozens of audio format pairs supported
FLAC vs AAC: how they compare
The numbers and capabilities at a glance, so you know what you're trading.
FLAC
- Year released
- 2001
- Compression
- Lossless
- Lossless
- Yes
- Channels
- Multichannel
- Player support
- Wide
- Best for
- Archival lossless
AAC
- Year released
- 1997
- Compression
- Lossy
- Lossless
- No
- Channels
- Multichannel
- Player support
- Universal
- Best for
- Streaming & mobile
Heads up before converting to AAC
What this specific conversion changes about your audio.
Converting FLAC to AAC discards audio data
FLAC is lossless, but AAC is lossy — this conversion permanently throws away part of the signal to save space. Keep your FLAC file as the master and use the AAC copy for sharing or playback.
Best practices for AAC
Small choices that keep your output sounding right.
- Play the first converted file before batch-converting the rest, so you catch a wrong setting early.
- For AAC, choose a bitrate that fits the use: 192–256 kbps keeps most music transparent, 320 kbps for archival-grade lossy.
- Check that title, artist, album and cover art survived the conversion; some players cache old tags.
When NOT to convert to AAC
Cases where a different format serves you better.
When you need an editable master
If you might re-edit or re-export later, keep the lossless FLAC original and skip flattening it to AAC. Lossy targets are for delivery, not for archiving the source of truth.
The importance of a good audio conversion
Why getting FLAC → AAC right matters more than you think.
Frequently asked
The basics everyone asks before dropping a track.
Convert FLAC to other formats
Convert other formats to AAC