AAC to FLAC Converter

Select files for conversion or just drag and drop them to the upload area

How to convert AAC files to FLAC online?

Step 1.

Upload AAC-file

Click "Choose File" button to select a aac file on your computer. AAC file size can be up to 50 Mb.
Step 2.

Convert AAC to FLAC

Click "Convert" button to start conversion.
Step 3.

Download your FLAC

Let the file convert and you can download your FLAC file right afterwards.

Information about AAC and FLAC file formats

Name AAC FLAC
Full name AAC - Advanced Audio Coding FLAC - Free Lossless Audio Codec
File extension .aac .flac
MIME type audio/aac audio/x-flac
Developed by Bell Labs, Fraunhofer Institute etc. Xiph.Org Foundation
Type of format Audio compression format Audio
Description Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates. AAC has been standardized by ISO and IEC, as part of the MPEG-2 and MPEG-4 specifications. FLAC (Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio, and is also the name of the reference codec implementation. Digital audio compressed by FLAC's algorithm can typically be reduced to 50-60% of its original size and decompress to an identical copy of the original audio data.
Technical details AAC supports inclusion of 48 full-bandwidth audio channels in one stream plus 16 low frequency effects channels, up to 16 "coupling" or dialog channels, and up to 16 data streams. The quality for stereo is satisfactory to modest requirements at 96 kbit/s in joint stereo mode; however, hi-fi transparency demands data rates of at least 128 kbit/s. The technical strengths of FLAC compared to other lossless formats lie in its ability to be streamed and decoded quickly, independent of compression level. In a comparison of compressed audio formats, FFmpeg's FLAC implementation was noted to have the fastest and most efficient embedded decoder of any modern lossless audio format.
Associated programs foobar2000, AIMP, DirectShow, QuickTime, VLC media player. Windows 10, Android, Blackberry 10 and Jolla devices.
Wiki https://en.wikipedia.org/wiki/Advanced_Audio_Coding https://en.wikipedia.org/wiki/FLAC