This study addresses the need for a standardized scale to evaluate the user experience (UX) of technical documentation, highlighting the role of high-quality documentation in enhancing user support in the fast-evolving technological landscape. Employing a multi-faceted approach, the authors reviewed existing literature, conducted interviews with users, and performed exploratory experiments. This multi-faceted methodology facilitated the identification of key UX dimensions and textual elements within technical documentation, leading to the development of an initial evaluation scale. The scale underwent a series of reliability and validity tests, including cross-validation with existing UX scales and user testing involving documents of varied quality levels. The findings confirmed the effectiveness of the scale in providing nuanced insights into UX of technical documentation. The study successfully generated a reliable and efficient scale tailored for the UX evaluation of technical documentation. This scale enables documentation teams to assess and improve documentation quality based on user feedback, enhancing the overall product experience and potentially boosting market share. By bridging the existing gap in UX evaluation tools specifically designed for technical documentation, the validated scale contributes to the body of knowledge in technical communication.