What does the generated consumer hook do if used outside the provider?

The generated use () hook reads the context with useContext and checks for undefined. If a component calls it outside the matching provider, it throws an explicit error ("use must be used within Provider") so the mistake surfaces immediately instead of silently returning undefined.

How are initial state values chosen?

Initial values are inferred from each field type: string fields start as an empty string, number fields as 0, boolean fields as false, array types as an empty array, and anything else as null. You can edit these defaults in the generated code after copying it.

What does the localStorage persistence option add?

Enabling "Persist to localStorage" adds two useEffect hooks: one loads saved state from a key derived from your context name on mount (parsing JSON with a try/catch), and another saves the current state to that key whenever it changes. This keeps the context value across page reloads.

Can I generate JavaScript instead of TypeScript?

Yes. Turn off "TypeScript support" and the tool omits the interfaces and type annotations, producing a plain .jsx provider module. The structure — context, provider, setters, and consumer hook — stays the same.

What are the setter functions it generates?

With "Generate setter functions" enabled, each state field gets a corresponding setXxx function (for example setTheme for a theme field) that updates only that key using the functional updater form, prev => ({ ...prev, key: value }). These setters are spread into the context value alongside the state.

Does the output include the 'use client' directive?

Yes. Because a context provider relies on useState and (optionally) useEffect, the generated file begins with the 'use client' directive so it works correctly as a Client Component in the Next.js App Router.

Context Provider Generator

Generate React Context API provider and consumer hook with TypeScript support

About this ToolHow it works, benefits & use cases

Spinning up a React Context by hand means writing the same createContext call, a provider with useState, setter functions, a guarded consumer hook, and matching TypeScript types every single time. This generator does it for you: name your context, define a state shape field by field (each with a type picked from string, number, boolean, string[], number[], or any), and it emits a complete 'use client' module — the typed context, a Provider component, generated setXxx actions for every field, and a use<Name>() hook that throws if you call it outside the provider. Toggle TypeScript on or off, optionally generate setter functions, and optionally wire up localStorage persistence with load-on-mount and save-on-change useEffect hooks. Sensible initial values are inferred from each field type, and the output includes inline usage comments. Everything is generated locally in your browser, and the layout is captured in a shareable URL.

How to Use

1Type a name into the "Context Name" field (for example Theme or Auth) — the helper text shows the resulting ThemeProvider and useTheme names.
2Build your state shape: click "Add Field", type each field name, and pick its type from the dropdown (string, number, boolean, string[], number[], or any).
3Toggle the options you need: "TypeScript support", "Generate setter functions", and "Persist to localStorage".
4Click "Generate Provider" to produce the full context module.
5Copy or download the result (named <Name>Provider.tsx or .jsx), or share the configuration via its URL.

Key Benefits

Generates the context, provider, typed actions, and a guarded consumer hook in one module
Per-field types (string, number, boolean, arrays, any) drive both the interface and inferred initial values
Optional setXxx setter functions wired with the functional setState updater pattern
Optional localStorage persistence with load-on-mount and save-on-change effects
TypeScript and JavaScript output from the same configuration
Consumer hook throws a clear error when used outside its provider
Runs entirely in the browser with a shareable URL for the setup

Common Use Cases

Scaffolding a theme or color-mode context with a persisted preference
Creating an auth or session context with typed state and setters
Standing up a settings or feature-flag provider shared across a component tree
Teaching the Context + Provider + custom-hook pattern with correct types
Bootstrapping global UI state without reaching for a heavier state library

Configuration

Context Name

Will generate ThemeProvider and useTheme hook

State Shape

Field nameType

TypeScript support

Generate setter functions

Persist to localStorage

Live preview: ThemeProvider.tsx

Generated Context Provider

Run to generate the context provider.

Context API Best Practices

Use Context for global or widely-shared state
Split large contexts into smaller, focused ones
Memoize context values to prevent unnecessary re-renders
Always check that context is used within its provider

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Context Provider Generator

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Key Benefits

Common Use Cases

Configuration

Context API Best Practices

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