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Formio.js

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Updated: 15 Jan 2026
2064 Stars

JavaScript powered Forms with JSON Form Builder

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Overview

The Form.io JavaScript library brings a powerful and versatile solution for creating and rendering forms directly within your application. Built with a focus on plain JavaScript and leveraging modern ES6 practices, it eliminates the need for additional frameworks like jQuery, Angular, or React. This makes it an excellent choice for developers looking for a lightweight, framework-agnostic approach to form management.

With the ability to render JSON schema forms and integrate seamlessly with the Form.io API, this library not only provides the tools to create forms but also a comprehensive SDK interface for robust interaction. Whether you’re developing a simple feedback form or a complex data collection wizard, this library can accommodate a variety of needs with its extensive feature set.

Features

  • Plain JavaScript Implementation: Utilizes modern ES6 practices, ensuring no framework dependencies, making it lightweight and easy to integrate.
  • JSON Schema Rendering: Renders forms based on JSON schemas, allowing for dynamic form generation and integration with Form.io’s backend.
  • Complete Form Builder: Includes an intuitive form builder that generates the JSON schema needed to create forms seamlessly.
  • Rich UI Components: Offers a variety of UI components such as nested layouts, date/time pickers, select inputs, and input masks to enhance user interaction.
  • Full JavaScript API SDK: Provides a comprehensive SDK for developers to easily connect with Form.io’s API, adding functionality and flexibility.
  • Multiple Rendering Options: Supports rendering forms as standalone components, embedded forms, or even as a wizard for sophisticated user experiences.
  • Easy Embedding: Allows for simple embedding of forms using a single line of code, making it convenient to integrate forms into existing projects.

This library stands out with its combination of ease of use and robust functionality, making it an ideal choice for developers looking to manage forms effectively in their JavaScript applications.