form0

form0 is an open-source form ecosystem for developers who want to define form logic once and use it across multiple platforms. It uses a shared JSON schema to handle validation, conditional visibility, calculations, and events without tying the underlying logic to a specific framework or renderer.

The platform is designed for developers who want control over form behavior, schema, integrations, and data rather than relying on a hosted form builder. The same form definition can be used across Node.js, browsers, mobile applications, and CLI workflows.

Key Features

JSON-Based Form Schema

Define fields, rules, and form behavior through a structured JSON schema.

• JSON-based form definitions
• Field configuration
• Conditional visibility
• Validation rules
• Calculations
• Event handling
• Centralized form logic

Framework-Agnostic Core

Keep form behavior separate from the interface that renders it.

• Runs in Node.js
• Browser support
• Mobile support
• Independent of a specific UI framework
• Reusable form logic across applications

React & React Native Bindings

Build form interfaces using existing React-based application stacks.

• React bindings
• React Native bindings
• Reuse the same schema across web and mobile
• Keep business logic separate from UI components

CLI Workflow

Build and test forms directly from the command line.

• Edit schemas
• Preview forms
• Test form behavior
• Work with schemas during development
• Keep form definitions within existing development workflows

AI-Assisted Editing

Use natural language to propose changes to form schemas.

• Describe schema changes in plain language
• Generate proposed modifications
• Validate changes before saving
• Keep AI-assisted edits within the schema workflow

Offline Mobile Forms

Run form logic locally on mobile devices without requiring a constant connection.

• On-device calculations
• On-device validation
• Conditional visibility on the device
• Suitable for offline data collection

Built For Developer-Controlled Forms

form0 is designed for teams that need structured forms without giving up control over their application architecture.

It is particularly suited to:

• Developers building custom form experiences
• Product teams creating structured data-collection workflows
• Compliance teams building audit and inspection forms
• Field teams collecting information through mobile applications
• Engineering teams that need reusable form logic across platforms
• Teams with custom data infrastructure that want to control where records are stored

Common Use Cases

Inspection Forms

Build structured inspection workflows with validation, conditional fields, and calculations while keeping the logic in a reusable schema.

Surveys

Create structured surveys that can run across web and mobile interfaces without duplicating form behavior.

Audits & Compliance

Build forms for audits, compliance checks, and other workflows where consistent validation and conditional logic matter.

Mobile Data Collection

Create forms that continue to perform calculations, validation, and conditional logic on the device even when working offline.

Inventories & Field Notes

Use structured schemas for inventory tracking, field notes, collection workflows, and other data-capture applications.

Form Logic Separate From the UI

One of the main ideas behind form0 is separating the form's behavior from how it is displayed.

Instead of embedding conditions, calculations, and validation directly inside individual UI components, developers can define that logic within a shared schema. The same definition can then be used with different interfaces and platforms.

This makes it possible to maintain a consistent form experience across web, mobile, and other environments without recreating the same rules for each application.

One Schema Across Platforms

form0 is built around the idea that a form definition should not need to change simply because the interface changes.

A single schema can provide the underlying behavior for Node.js applications, browser experiences, React interfaces, React Native apps, and CLI-based workflows. This can reduce duplicated form logic when the same data-collection process needs to exist across multiple surfaces.

Your Data Model, Your Storage

form0 provides the form engine without requiring teams to adopt a specific storage system or data model.

That gives developers more control over where submitted records live and how they are stored, processed, and synchronized. The form layer can therefore fit into an existing application architecture rather than forcing the project into a separate hosted form ecosystem.

AI-Assisted Schema Development

The CLI and editing workflow also include AI-assisted schema changes. Developers can describe what they want to change in plain language, while the proposed modification can be validated before being saved.

This provides a more accessible way to work with complex schemas without removing the underlying developer control over the final form definition.

Why It Matters

Building the same form experience across web and mobile often means duplicating validation, calculations, conditional logic, and event handling inside different application layers.

form0 takes a schema-first approach by putting that behavior into a reusable form engine. The interface can change while the underlying logic remains consistent.

The result is an open-source form ecosystem for developers who want structured, portable form logic while keeping control over the UI, application architecture, data model, and storage.

Build Forms Around a Shared Schema

Define validation, conditions, calculations, and events once, then use the same form logic across Node.js, browsers, React, React Native, mobile apps, and CLI workflows.