KeystoneJS simplifies the process of building forms by offering an intuitive and customizable form API. Whether you're creating a simple contact form or a complex data input portal, KeystoneJS provides the tools to streamline the form creation process. 

• Customization of Forms: KeystoneJS allows developers to craft tailored forms that align with their application's design and functionality. You can easily define the structure of the form fields, choosing from various field types like text, email, date, and more. Customization extends to layout, styling, and even conditional rendering of form elements based on user interactions. 
• Validation for Reliable Data Input: Ensuring data integrity is crucial for any application. KeystoneJS enables robust form validation, allowing developers to enforce specific rules on user input. From basic field validations such as required fields and data formats to more intricate validation logic, KeystoneJS equips you with the tools to maintain high data quality. 

KeystoneJS simplifies the implementation of validation rules, bolstering data accuracy and reliability. 

• Built-in Validation Rules: KeystoneJS provides an array of pre-built validation rules, such as checking for valid email formats, required fields, and data length restrictions. These rules can be effortlessly applied to form fields, minimizing the chance of erroneous data submission. 
• Custom Validation Logic: For more intricate validation scenarios, KeystoneJS enables developers to define custom validation functions. This empowers you to implement complex business logic while maintaining data integrity.