Freesound Forums

Here is a online tool that I use all the time to convert certain sounds into a different ones enjoy. Its really handy if there is sounds that you've recorded that Freesound doesn't accept.

http://audio.online-convert.com/

And just to let u know, it can convert any sound file into any type of file u want for example this is all of the types of files u can convert:

Convert to AAC
Convert to AIFF
Convert to FLAC
Convert to M4A
Convert to MP3
Convert to OGG
Convert to OPUS
Convert to WAV
Convert to WMA