Why generate a schema from my config?

A JSON Schema lets you validate config files at startup, catching missing or mistyped values before your app runs. Use it with config libraries like convict, envalid, or custom validation logic.

How does the schema handle nested config sections?

Each nested object becomes a sub-schema with its own properties and required fields. The tool recurses through all levels, producing a complete schema that covers the entire config structure.

Can I add optional fields to the schema?

The generated schema marks all present fields as required. After generation, remove fields from the required array to make them optional, or add additionalProperties: false to restrict the schema.

DevBento

Herramientas/Generador de JSON a TypeScript y Go/Generate JSON Schema from Config Object

Generate JSON Schema from Config Object

Generate a JSON Schema draft-07 document from a nested application configuration. Paste your config JSON to get a complete validation schema for your data.

Salida

Nombre raíz

Ruta de importación

Entrada JSON

Salida TypeScript

// Generated by DevBento — json-to-typescript
interface RootApp {
  name: string;
  version: string;
  debug: boolean;
}

interface RootDatabaseCredentials {
  user: string;
  password: string;
}

interface RootDatabase {
  host: string;
  port: number;
  credentials: RootDatabaseCredentials;
}

interface RootFeatures {
  darkMode: boolean;
  maxConnections: number;
  allowedOrigins: string[];
}

interface Root {
  app: RootApp;
  database: RootDatabase;
  features: RootFeatures;
}

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Generate JSON Schema from Config Object

Application configs have deep nesting: app settings, database credentials, feature flags. This example generates a JSON Schema from a multi-level config structure so you can validate configuration files before your app starts.

What You Get

The tool produces:

Root object schema with three top-level sections: app, database, features
Nested schemas for database.credentials with its own required fields
Boolean detection: debug and darkMode become "boolean"
Integer detection: port and maxConnections become "integer"
Array schema for allowedOrigins with string items

How to Use

The example loads with a sample application config in Schema mode
The nested structure shows how each config section gets its own sub-schema
Copy the schema and use it to validate your config files
Replace with your actual config JSON to generate a schema for your project

Real-World Pattern

Configuration validation prevents runtime errors from missing or mistyped config values. Generate a schema from your default config, then validate user-provided or environment-sourced configs against it at startup.

🔒

Nothing you paste leaves this tab. Every tool runs entirely in your browser — no upload, no server, no account.