There are number of audio converters available. Some come in the form of online tools and some; downloadable software. Some are free and some paid. Yet all of them do basic conversions to certain required file formats. What if you have downloaded a file in a certain format, or someone sends it to you?. You are looking forward to quickly and easily change the format to a common one. FlicFlac is a free audio converter which will convert your files into FLAC, WAV, MP3, OGG and APE files.
Download FlicFlac (link provided at the end of this post), install and open it. Drag and drop required files into this tool and start converting into the required format. You might need to change the output format and audio quality settings. To do so, click the settings buttons and hover over MP3 Presets. From here, you can define presets or select from the ones available. Removal of files which have been converted already, by a single click comes handy with FlicFac.
Overall, a simple tool and does what it says. Download to give it a try.
I recommend Avdshare Audio Converter easy to convert OGG to FLAC.