Wikipedia is a powerful platform to make climate change information accessible to all. However, people working in the climate change field often overlook Wikipedia as an outreach channel. For researchers, emphasis is typically placed on academic publications, and for practitioners, communication typically takes place through specialist publications, reports and briefs. However, Wikipedia can be used to communicate information from these outputs to a different (and wider) audience. This publication shares guidance and tips on how to edit Wikipedia. It is intended for researchers, practitioners, communicators and any others with access to climate change information who would like to share it more widely with the world.