Media bias includes opinions being represented as fact, facts being distorted or omitted, and loaded language that gives the impression of events or people in a light that is untrue and meant to sway the reader’s opinion instead of inform them.
Media Bias is when a sources is biased for or against a particular point of view.
Not all fact-checking sites are the same. Some have bias themselves. Here are a list of non-bias fact-checking sites.
These sites do a decent job of fact-checking, but they lean "left" or "right".
These sites focus on special issues within the national debate.