Convert FLAC to AAC Online Free
Convert lossless FLAC audio to AAC format for Apple devices, iTunes, and streaming services. FFmpeg encodes your FLAC with high-quality AAC compression optimized for mobile and portable playback.
ChangeThisFile converts your FLAC to AAC using FFmpeg on secure servers. AAC delivers excellent audio quality at smaller file sizes, and is natively supported on all Apple devices, Android, and streaming platforms. Your file is encrypted during transfer and auto-deleted after conversion, free with no signup.
Convert FLAC to AAC
Drop your FLAC file here to convert it instantly
Drag & drop your .flac file here, or click to browse
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FLAC vs AAC: Format Comparison
Key differences between the two formats
| Feature | FLAC | AAC |
|---|---|---|
| Compression | Lossless | Lossy |
| Typical File Size (3 min) | ~20–40 MB | ~3–6 MB |
| Audio Quality | Perfect (identical to source) | Very good (transparent at 128+ kbps) |
| Apple Device Support | Requires third-party app | Native (iTunes, iPhone, iPad, Apple TV) |
| Android Support | Varies by device | Native support |
| Streaming Platform Use | Rare (Tidal lossless) | Dominant (Apple Music, YouTube, Podcasts) |
| DRM Support | No | Yes (FairPlay, Widevine) |
| Typical Bitrate | N/A (lossless) | 96–256 kbps |
When to Convert
Common scenarios where this conversion is useful
iPhone and iPad music libraries
Apple devices do not support FLAC natively in the default Music app. Convert your FLAC collection to AAC for seamless syncing with iPhone, iPad, and Apple Watch via iTunes or Finder.
Reducing storage on portable devices
FLAC files are large. Converting to AAC at 256 kbps significantly reduces file size while maintaining near-transparent quality, freeing storage on phones and portable players.
Podcast and online content distribution
Podcast platforms and streaming services encode audio as AAC. Convert FLAC master recordings to AAC for upload to Spotify, Apple Podcasts, and YouTube.
Apple TV and HomePod playback
Apple TV and HomePod work best with AAC audio. Convert FLAC files to AAC for a native playback experience without third-party apps or transcoding delays.
How to Convert FLAC to AAC
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1
Upload your FLAC file
Click the upload area or drag and drop your FLAC file. Up to 50MB is supported. Your file is uploaded over an encrypted HTTPS connection.
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2
Convert to AAC
Click Convert. FFmpeg decodes the lossless FLAC audio and encodes it as AAC using the native AAC encoder with high-quality settings.
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3
Download your AAC file
Download the converted AAC file. It is automatically deleted from our servers after you complete the download.
Frequently Asked Questions
Yes. AAC is a lossy format, so converting from lossless FLAC introduces some irreversible quality reduction. However, at 192 kbps or higher, AAC quality is transparent to most listeners and indistinguishable from the lossless original in most listening environments.
FFmpeg encodes AAC at a standard high-quality bitrate. For critical listening or archiving, keep your original FLAC files and use AAC only for distribution copies.
Yes. The native Music app on iPhone and iPad plays AAC files directly. You can also AirDrop AAC files to your iPhone, and they will be recognized and playable immediately.
Generally yes. AAC achieves better audio quality than MP3 at the same bitrate due to a more efficient codec design. At 128 kbps, AAC typically sounds noticeably better than MP3.
Yes. AAC files (in the M4A container) support rich metadata including title, artist, album, artwork, genre, track number, and lyrics, which are well-supported in iTunes and Apple Music.
AAC is the audio codec; M4A is the file container that holds AAC audio. When this converter outputs an AAC file, the audio is encoded with the AAC codec. Some players display .aac or .m4a depending on the container used.
No. This conversion is not lossless. FLAC decodes perfectly to PCM audio, but re-encoding to AAC applies lossy compression. This is a one-way quality reduction.
Yes. Files are uploaded over HTTPS, processed by FFmpeg in an isolated environment, and automatically deleted after conversion. We do not store or share your audio files.
Yes. FFmpeg handles high-resolution FLAC files. The output AAC will typically be downsampled to 44100 Hz or 48000 Hz, which is standard for AAC and sufficient for playback on all devices.
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