Convert AAC to FLAC

Transform your modern successor to mp3 with better quality into FLAC format. Free, private, and browser-based.

How it works

  1. Upload AAC Files — Drag and drop your AAC files into the converter, or click to browse. Common sources: apple music, youtube audio.
  2. Convert to FLAC — The converter processes your files to FLAC format entirely in your browser. No files are uploaded to any server — your privacy is guaranteed.
  3. Download Results — Download your converted FLAC files instantly. For multiple files, download individually or as a ZIP archive.

Why convert AAC to FLAC

  • Share AAC files from Apple devices with Windows and Android users
  • Convert to lossless FLAC format to prevent further quality degradation during editing
  • Leverage FLAC advantages: lossless quality — bit-for-bit identical to original
  • Overcome AAC limitations: less universally supported than mp3 in older devices

FAQ

Is AAC to FLAC conversion free?
Yes, Fileza.io converts AAC to FLAC completely free with no limits on file size or number of conversions. No hidden fees, no watermarks, and no account required.

Will I lose quality converting AAC to FLAC?
No quality is lost. FLAC uses lossless compression, preserving all original data from your AAC file.

Is it safe to convert AAC to FLAC online?
Absolutely. Unlike most online converters, Fileza.io processes your files entirely in your browser using WebAssembly. Your AAC files are never uploaded to any server — the conversion runs on your own device, keeping your files 100% private.

Can I convert multiple AAC files to FLAC at once?
Yes, Fileza.io supports batch conversion. Drag and drop multiple AAC files at once and they will all be converted to FLAC simultaneously. Download them individually or as a ZIP archive.

Does AAC to FLAC conversion work on mobile?
Yes, the converter works on any device with a modern web browser — iPhones, iPads, Android phones, and tablets. No app installation required.

Will the converted FLAC files be smaller or larger than AAC?
File sizes depend on content and quality settings. AAC files are typically small (better quality than mp3 at same size), while FLAC files are medium (50-70% of wav).

How long does AAC to FLAC conversion take?
Most conversions complete in seconds. The exact time depends on file size and your device performance. Since processing happens locally in your browser, faster devices convert more quickly. Longer audio files may take a few extra seconds.