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AAC to FLAC

Free Online AAC to FLAC Converter – Batch Convert, Cut, and Compress Videos, Audio & Images

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This tool converts AAC to FLAC completely free and without any functional limitations. Since it is based on the browser API, the processing speed is the fastest because all files are processed locally on your device and are not uploaded to our server.
About AAC files
AAC (Advanced Audio Coding) is a highly efficient audio compression format developed by Fraunhofer IIS, AT&T, Dolby, and others. It delivers better sound quality than MP3 at similar bitrates, making it ideal for music streaming, podcasts, and mobile devices. AAC is the default audio format for Apple products (iTunes, iPods, iPhones) and is widely supported across platforms. Its lossy compression reduces file sizes significantly while maintaining excellent audio fidelity, though it's not as universally compatible as MP3.
About FLAC files
FLAC (Free Lossless Audio Codec) is a high-quality audio format that compresses audio files without losing any sound quality, making it ideal for archiving and audiophiles. It retains all original audio data while reducing file sizes by up to 50% compared to uncompressed formats like WAV. FLAC is widely supported across devices and software, though not natively playable on some portable players. As a royalty-free open format, it's popular among music enthusiasts for preserving studio-quality recordings without the large file sizes of uncompressed audio.

Batch Convert AAC to FLAC Online

With this SoConvert tool, you can convert multiple AAC files to FLAC directly in your browser for free. You can also adjust the audio Bitrate during conversion.

Click the Options button in the top-right corner to open the settings panel, where you can customize the output FLAC audio Bitrate.

Other Settings Explained:

  • Encoding Speed: Choose the encoding speed. Faster speeds result in larger file sizes.
  • Audio Bitrate: Recommended range is 8 – 320 Kbps.
  • Cut Audio: Trim the audio using a start and end time in HH:MM:SS format. For example, setting 00:00:05 to 00:00:08 will cut a 3-second clip from the audio.

    • Before converting, you can choose a local folder to save the converted FLAC files. Once an AAC file is successfully converted, it will be automatically saved to your selected directory—no manual download required.

    Save All: After all AAC files are converted, click “Save All” to export every FLAC file to your chosen folder in one go.