OBJECTIVES: The 39-item Parkinson’s Disease Questionnaire (PDQ-39) is the most thoroughly validated and extensively used self-report measure for the assessment of health-related quality of life in people with Parkinson’s (PwP). The measure has been shown to possess sound psychometric properties and its use is widely recommended. Given the extent of its use and increasing emphasis on electronic data capture, a web based version of the PDQ-39, the ePDQ, has been developed. The aim here is to present reliability and validity data that confirm the psychometric quality of the ePDQ.  METHODS: Recruitment of participants was undertaken with the support of Parkinson’s UK. Participants were emailed a unique link to an online survey containing the ePDQ and demographic questions. RESULTS: A total of 118 PwP (66 males, 52 females) fully completed the ePDQ, a response rate of 91.4%. The mean age was 63.48 years, mean disease duration 5.73 years and mean age at diagnosis 57.69 years. Score reliability was assessed by item-total correlations which ranged from 0.34 to 0.90. Cronbach’s alpha was calculated at between 0.64 and 0.95 for the eight domains of the ePDQ. Construct validity was assessed by comparing group means for disease duration and gender and all previously hypothesised differences were confirmed. Furthermore, a higher order factor analysis confirmed the appropriateness of calculating a summary score index.  CONCLUSIONS: Data indicates that the ePDQ possesses appropriate levels of reliability and validity and largely mirrors the psychometric properties of the paper-based version.