IntroductionIn‐person physiotherapy services are not readily available to all individuals with musculoskeletal conditions, especially those in rural regions or with time‐intensive responsibilities. The COVID‐19 pandemic highlighted that telehealth may facilitate access to, and continuity of care, yet many physiotherapists lack telehealth confidence and training. This project co‐developed and evaluated a web‐based professional development toolkit supporting physiotherapists to provide telehealth services for musculoskeletal conditions.MethodsA mixed‐methods exploratory sequential design applied modified experience‐based co‐design methods (physiotherapists [n = 13], clinic administrators [n = 2], and people with musculoskeletal conditions [n = 7]) to develop an evidence‐informed toolkit. Semi‐structured workshops were conducted, recorded, transcribed, and thematically analysed, refining the toolkit prototype. Subsequently, the toolkit was promoted via webinars and social media. The usability of the toolkit was examined with pre‐post surveys examining changes in confidence, knowledge, and perceived telehealth competence (19 statements modelled from the theoretical domains framework) between toolkit users (>30 min) and non‐users (0 min) using chi‐squared tests for independence. Website analytics were summarised.ResultsTwenty‐two participants engaged in co‐design workshops. Feedback led to the inclusion of more patient‐facing resources, increased assessment‐related visual content, streamlined toolkit organisation, and simplified, downloadable infographics. Three hundred and twenty‐nine physiotherapists from 21 countries completed the baseline survey, with 172 (52%) completing the 3‐month survey. Toolkit users had greater improvement in knowledge, confidence, and competence than non‐users in 42% of statements. Seventy‐two percentage of toolkit users said it changed their practice, and 95% would recommend the toolkit to colleagues. During the evaluation period, the toolkit received 5486 total views.DiscussionThe co‐designed web‐based Musculoskeletal Telehealth Toolkit is a professional development resource that may increase physiotherapist's confidence, knowledge, and competence in telehealth.