Why should I type my configuration objects?

Typed configs catch typos and missing fields at compile time instead of runtime. If someone changes a config key or removes a field, TypeScript immediately flags the error across your entire codebase.

How do I use generated config types with environment variables?

Generate types from your config JSON, then use the interfaces to type your config loader. Pass environment variables through a validation step that matches the generated type shape.

What about optional config fields?

This example shows all fields as required. For optional fields, mark them with ? in your types after generation, or use a JSON sample where some fields are omitted to see how the tool handles missing keys.

DevBento

Tools/JSON to TypeScript & 8+ Languages Generator/Convert JSON Config to TypeScript

Convert JSON Config to TypeScript

Generate TypeScript types from a nested configuration object. Paste your config JSON and get complete typed interfaces ready for your TypeScript project.

Output

Root name

Import path

JSON Input

TypeScript Output

// 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;
}

Send to:

Paste JSON to pretty-print, minify, validate, or visualize as an interactive graph. Syntax highlighting, tree view, and graph view with export.

ymlJSON / YAML / TOML / CSV / XML / HTML / Markdown

Convert between JSON, YAML, TOML, CSV, XML, HTML, Markdown, and .env in your browser. Paste config or API data and get the equivalent format instantly.

Convert JSON Config to TypeScript

Configuration objects often have deep nesting: app settings, database credentials, feature flags. This example converts a multi-level config structure into typed TypeScript interfaces so every config access is type-safe.

What You Get

The tool generates:

RootApp for top-level app settings (name, version, debug flag)
RootDatabase and RootDatabaseCredentials for the database section with nested credentials
RootFeatures for the feature flags section including an allowed origins array
All primitives correctly typed: strings, numbers, booleans, and string arrays

How to Use

The example loads with a sample application config
The nested structure demonstrates how deeply nested objects each get their own interface
Copy the output and use it to type your config loader or settings module
Replace with your actual config JSON to generate types for your project

Real-World Pattern

Application configs typically have 2-3 levels of nesting. Database sections contain credentials, feature sections contain arrays of allowed values. The path-based naming (e.g., RootDatabaseCredentials) makes it clear where each type fits in the config hierarchy. Use these types with your config validation library to catch misconfigurations at build time.

🔒

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