question: OBJECTIVE: To analyze online information available on the internet about COVID-19 and childhood cancer and discuss its reach potential with regard to supporting family functioning METHOD: Documentary research supported by thematic analysis and the concept of family functioning and support A total of 27 publications available on the websites of reference institutions in pediatric oncology, from March 1 to May 31, 2020, were analyzed RESULTS: Two themes guided the presentation of results with emphasis on language and sustainability assumptions to content, and to conveyed meanings and intentionality The publications prospect families/people with basic knowledge about COVID-19 and have little information specific to the relationship with childhood cancer FINAL CONSIDERATIONS: Threatening circumstances require informational support This study revealed incipient of specificity and a prescriptive tone in the online information available in early times of the pandemic, questioning the scope of support for family functioning