Media Bias/ Fact Check Reviews 

These people are trying their best to create what their name implies. As accurate a view of media bias as possible. I've spent considerable time researching the people and results of their work in this endeavour and although they could be more scientific in their processes, they are pretty spot on to a high degree.
Those giving a 1 star review here, are examples of the extremist bias Media Bias/Fact Check are tasked with uncovering.
Yes, Media Bias/Fact Check do rate more Left leaning media as highly factual than Right leaning media, but this is likely because Right leaning media is more likely to contain disinformation, which skews the results (all over the world), through no fault of any organisation attempting to show actual bias in media.

Found this site with high hopes but it only took 2-3 visits to realize that they're just more of the same left-leaning grifters dressed in centrists clothing. They are heavily left-leaning and give high credibility ratings to both CNN & MSNBC after all the lies and deliberately misinforming the American public. This tells me all I need to know. Right-of-center sites get labeled crackpots and kooks and branded "garbage" and "conspiracy".

So, if you were looking for a straight shooter tell it how it is site, skip over these leftist shills. You can get the same out of Google.

This site is helpful, but I think this site has a mild left bias. It seems that they are rating left and left-center sites more favorably than right and right-center sites. Using their filtered search, I've found a few left-center sources that are rated very high in factual reporting, but no right-center sources are rated very high in that regard. There are also more LEFT sources being rated as high in factual reporting than RIGHT sources. Something tells me that this site has a slight liberal bias. Of course nothing is perfect, but this is just something I'd like to point out.

You can use their filtered search to check for yourself. I can't include links in my review so you'll have to see it for yourself.

You might want to ignore the one other review since it just says "left-leaning media bias" and refuses to elaborate further. Also, how does this site still have 3.2 stars when it only has one 1 star review (there's my more positive review but even if I rated it 5 stars it still shouldn't be able to reach above 3 stars)?