Formio

Formio is an open-source form-building and data-management platform designed to accelerate the creation and integration of forms in web and mobile applications. It combines a drag-and-drop Form Builder with a backend API layer that can automatically expose RESTful endpoints for both form definitions and form submissions, enabling developers to build form-driven apps without writing server code.

Forms in Formio are defined in JSON. The form definition specifies fields, layout, validation, and logic such as conditional visibility or computed values. The platform provides a JavaScript library, formio.js, that renders and handles submissions for these forms in web pages or applications, and a visual Form Builder to create or edit forms without code.

Deployment and usage: Formio supports both self-hosted deployments (open-source core) and a hosted cloud service offered by Form.io. It follows an API-first approach, allowing forms and submissions to be accessed and managed via REST endpoints, and can be embedded into websites or integrated with client frameworks and backends through these APIs.

Data handling and security: Submissions are stored in the Formio backend or an external backend, with API access for retrieval, filtering, and export. The platform includes features for authentication and access control in its enterprise offerings, and is used to build surveys, onboarding forms, data collection portals, and other data-entry workflows.