The new tool will notify users of the messaging app - which has more than 900 million users - if a piece of news that they have received is deemed fake by Chinese censors, police or official media outlets.
The feature is one of WeChat's 'mini programs' launched this year that function only within its platform, which Chinese netizens use for messaging, mobile payments, ordering food, and even renting bicycles.
The program will also function as a social game, ranking users based on how many rumour-debunking articles they have read.
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It will also notify users if a news item they send to their friends is later found to be false.
