Background: When a family member resides in long term care facility (LTC), family carers continue caregiving and have been found to have decreases in mental health. The aim of My Tools 4 Care-In Care (an online intervention) is to support carers of persons living with dementia residing in LTC through transitions and increase their selfefficacy, hope, social support and mental health. This article comprises the protocol for a study to evaluate My Tools 4 Care-In Care (MT4C-In Care) by asking the following research questions: 1) Is there a 2 month (immediately post-intervention) and 4 month (2 months post-intervention) increase in mental health, general self-efficacy, social support and hope, and decrease in grief and loneliness, in carers of a person living with dementia residing in LTC using MT4C-In CARE compared to an educational control group? 2) Do carers of persons living with dementia residing in LTC perceive My Tools 4 Care-In Care helps them with the transitions they experience? Methods: This study is a single blinded pragmatic mixed methods randomized controlled trial. Approximately 280 family carers of older persons (65 years of age and older) with dementia residing in LTC will be recruited for this study. Data will be collected at three time points: baseline, 2 month, and 4 months. Based on the feasibility study, we hypothesize that participants using MT4C-In Care will report significant increases in hope, general self-efficacy, social support and mental health quality of life, and significant decreases in grief and loneliness from baseline, as compared to an educational control group. To determine differences between groups and over time, generalized estimating equations analysis will be used. Qualitative descriptive analysis will be used to further evaluate MT4C-In Care and if it supports carers through transitions.