JSONForm

JSONForm refers to a family of tools and conventions for describing user interface forms with JSON. It enables developers to declare a form’s fields, layout, and validation in a data structure that can be rendered by a client or server component into an interactive form. The approach separates form specification from presentation, supporting dynamic, data-driven UIs across web, mobile, and desktop platforms.

A typical JSON form definition includes metadata such as a form title and description and an array of field definitions. Each field specifies a name, a type (such as string, number, boolean, select, date, file, or array), a label, and attributes like required, readOnly, placeholder, and default value. Validation rules may cover length, pattern, minimum/maximum values, and custom validators. Many implementations also provide options for layout hints, conditional visibility, repeatable sections, and custom widgets.

Renderer engines create the user interface from the JSON, apply client-side validation, and bind user input to a JSON data object. Submissions are commonly serialized as JSON and sent to APIs. Some tools align with JSON Schema or other form-specifications to facilitate interoperability.

JSONForm is used in form-heavy applications such as administration panels, configuration screens, surveys, and content-management interfaces, where dynamic form generation reduces code duplication and simplifies localization and theming.