Convert FLAC to AAC
Convert any audio file to AAC format online for free. Fast, secure, and easy-to-use audio to AAC converter with no software installation required.
Drag & Drop Audio File
or click below to browse
Supported formats (Max 50MB, 30 min • Sign in for 200MB, 1 hr)
Why Choose Scriptivox FLAC to AAC Converter?
Fast Conversion
Our powerful servers process your files quickly, delivering converted files in seconds.
100% Free
Convert your files completely free with no hidden costs or subscription fees.
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Your files are encrypted and automatically deleted after conversion. We never store or share your data.
No Installation
Works directly in your web browser. No software download or installation required.
How to Use FLAC → AAC
Upload File
Drag and drop your FLAC file or click to browse. Supports files up to 1GB.
Convert
Select AAC as your output format and click convert. Our servers will process your file instantly.
Download
Download your converted file instantly. The download link expires in 1 hour for security.
FLAC vs AAC: format comparison
How the two formats differ on the things that change your result.
| Specification | FLAC (source) | AAC (result) |
|---|---|---|
| Container | FLAC | ADTS / raw AAC |
| Developed by | Xiph.Org Foundation | MPEG / Fraunhofer IIS |
| Introduced | 2001 | 1997 |
| Audio codecs | FLAC | AAC-LC, HE-AAC |
| Compression | Lossless (compressed) | Lossy |
| Max sample rate | 192 kHz | 96 kHz |
| Max channels | 8 | 8 |
| Gapless playback | Yes | Partial |
| Metadata / tags | Vorbis comments | ID3v2 (limited in ADTS) |
| Approx. file size | 5–7 MB per minute | 0.72–1.92 MB per minute |
| Licensing | Royalty-free | Patent-licensed |
| Plays natively on | Native: Web browsers, Windows, macOS, iOS, Android · Needs a player: Smart TVs | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs |
| Best for | long-term archiving, audiophile listening, CD ripping | streaming services, mobile playback, broadcast |
What changes when you convert FLAC to AAC
Converting FLAC to AAC trades detail for size, and the trade is permanent. Encode at the top of the 96 to 256 kbps range if the file will be edited again later. Size falls from about 6 MB per minute to around 1.3 MB per minute.
FLAC can carry sample rates up to 192 kHz, but AAC tops out at 96 kHz. High-resolution sources are resampled down on the way through.
This conversion moves the file toward a different purpose: FLAC suits long-term archiving, audiophile listening, CD ripping, whereas AAC is chosen for streaming services, mobile playback, broadcast.
Tags do not transfer verbatim. FLAC stores them as Vorbis comments while AAC uses ID3v2 (limited in ADTS), so titles and artwork are remapped and unusual custom fields may not survive.
About FLAC to AAC Conversion
Converting FLAC to AAC means moving audio out of the FLAC container, introduced in 2001, and into ADTS / raw AAC, which arrived in 1997. The two were designed with different priorities, and that is what determines whether this conversion costs you quality, storage, or compatibility.
Developed by Xiph.Org Foundation in 2001, FLAC stores audio using FLAC. That codec choice sets the upper bound on what any conversion can preserve.
AAC, from MPEG / Fraunhofer IIS and dating to 1997, uses AAC-LC, HE-AAC and plays natively on 6 of the six platform categories we track. That combination is usually why people convert into it.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
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