PurposeWith fundraising appeals for coronavirus disease 2019 (COVID-19) relief efforts and donating to those affected by its spread and impact, donors, volunteers and charities can all play their part and render much-needed support and aid. The purpose of this study is to be part of such effort by empirically examining the intrinsic and extrinsic motivations that drive people's attitudes to engage in fundraising campaigns launched in many communities, providing a richer understanding of donors' responses.Design/methodology/approachThe present work follows a quantitative approach based on an online survey conducted among potential Kuwaiti charitable donors. A total of 565 useable responses (356 females, 209 males) were obtained using snowball sampling and analyzed through smart partial least squares (SmartPLS) software.FindingsWith 90% of respondents financially able to donate who have a monthly income equal to or greater than the average (US$2000), this study confirms the suitability of the model used in predicting donors' attitudes to contribute online to grassroots fundraising campaigns. It reveals that all constructs included in the model (i.e. charitable projects geared for those affected by the pandemic, Internet technology (IT) features and religiosity level) are statistically significant, except for trust in charities.Practical implicationsThis study suggests that in uncertainty and concern surrounding COVID-19, nonprofit organizations, charities and governments should make concerted efforts toward mitigating the impacts of the pandemic on families and workers who are on the frontline against its outbreak. Possible areas need to be improved through suitable proactive strategies to solicit online monetary donations, such as charitable projects with inclusive information, focus attention on IT features (e.g. privacy, trustworthiness, security and effectiveness) and strengthen the religious faith of donors toward the significance of helping vulnerable groups and regions.Originality/valueThe research adds value to the literature on donation and giving behavior by offering an in-depth understanding of what influences online donation attitudes, especially amid such an unprecedented epidemic crisis.