Multicomponent interventions with carers of people with dementia demonstrate positive effects on the health and quality of life for carers and care recipients. The World Health Organization's iSupport for Dementia is an evidence-based online psychoeducation programme for carers. However, the programme was mainly implemented as a self-learning tool which might have limited its positive effects on carers and care recipients. Evidence for online multicomponent interventions with carers that incorporates the iSupport programme remains unknown.