English: The Climate and Development Knowledge Network (CDKN) and Future Climate for Africa (FCFA) have launched a new guide for climate change professionals on how to contribute climate change information to Wikipedia. Our aim is to show that although editing Wikipedia can seem daunting at first, once you are familiar with the Wikipedia style and editing norms, it is relatively easy to contribute. We outline why, in an era of fake news, Wikipedia is a powerful vehicle for sharing more robust, verified climate change information, and making climate knowledge and the latest scientific findings more freely available to the public. We highlight the significant challenges Wikipedia faces in ensuring diversity both in terms of editors and contributions – with a notable lack of women editors and editors from the Global South. We advocate that more female editors and editors from developing countries are critical to make Wikipedia’s information more relevant, localised and representative of the ‘sum of human knowledge’.