Designers often face challenges when converting website ideas into code, as direct implementation can be labor-intensive and subject to stakeholder approval. Fortunately, a variety of free Web UI mockup tools are available to facilitate the creation of interactive prototypes that mirror real web pages, allowing for collaborative feedback without the risk of extensive rework. These tools, including Balsamiq, Protopie, Mockplus, and others, offer features such as drag-and-drop interfaces, interactive elements, and team collaboration capabilities, with pricing models ranging from free trials to monthly subscriptions. Additionally, LambdaTest offers a suite of over 100 free online tools aimed at enhancing productivity for developers and testers, ranging from format converters to random data generators and security tools. Arnab Roy Chowdhury, a UI developer and blogging enthusiast, has compiled this extensive list, highlighting both the capabilities and pricing structures of these resources to support designers in creating dynamic, UX-rich web prototypes.