FLAC have increased in popularity in recent years because they're all audio formats that lose absolutely no quality unlike formats such MP3 or OGG.
If you've never come across it yet, FLAC stands for Free Lossless Audio Codec which is an audio format similar to MP3 but completely lossless meaning that audio is compressed in FLAC without any loss in quality.
To the untrained ear, it's hard to distinguish the difference between a FLAC file and an MP3 although musicians and editors certainly will notice. The principle is same as how a ZIP file works but FLAC offers superior compression and quality because FLAC is designed specifically for audio.
FLAC Converter Pro is a simply tool that can be used to encode any format to FLAC, FLAC Converter Pro makes it incredibly easy to convert to FLAC because you just have to drag and drop files into the interface.
Fast and easy to use, FLAC Converter Pro is a great user friendly app for those that need to compress audio files without losing any quality at all.