Free TOML to TypeScript Converter — generate typed TypeScript interfaces from TOML in your browser

Related Tools

🧬 TOML to TypeScript — Free Online Tool

Convert TOML to TypeScript online, free. TOML is a readable configuration format built around key/value pairs and tables. TypeScript interfaces give compile-time types for data crossing your app. TOML to TypeScript conversion parses your TOML against the TOML v1.0.0 grammar (https://toml.io/en/v1.0.0), builds an in-memory model of its keys, nested objects and arrays, then emits ready-to-use TypeScript types as interfaces with optional members following the TypeScript Handbook conventions. Processing runs in your browser in JavaScript with no upload or server round-trip — no size limit beyond your device's memory, so multi-megabyte documents convert in milliseconds and sensitive payloads never leave your machine. Typical uses include typed API clients, React/Next.js props and shared front/back types.

🚀 Why use this TOML to TypeScript tool?

It maps the full structure of your TOML onto idiomatic TypeScript types, following the TypeScript Handbook conventions. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.

Key Features

Instant, in-browser

Paste TOML and generate TypeScript types from TypeScript immediately. Conversion runs client-side, so there is no upload wait and large documents stay fast.

🧩Structure-aware mapping

Nested TOML objects, tables and arrays are mapped faithfully onto TypeScript, including nested types and optional fields.

🔒100% private

Your TOML never leaves your device — everything is processed locally in JavaScript, with nothing logged or stored.

🆓Free, no signup

Unlimited conversions with no account, no quotas, and no watermark. Works on desktop and mobile.

Popular Use Cases

Typed models from samples

  • Turn a sample TOML payload into TypeScript types
  • Skip hand-writing boilerplate models
  • Keep front-end and back-end shapes in sync

typed API clients

  • typed API clients
  • React/Next.js props
  • shared front/back types

Onboarding a new API

  • Paste an example TOML response
  • Get typed TypeScript to consume it safely
  • Catch shape mismatches at compile time

What It Handles

Structure

  • Nested objects & tables
  • Arrays / lists
  • Deeply nested documents

Values

  • Inferred types (string, number, boolean)
  • Optional / nullable fields
  • Nested type names

Workflow

  • Copy or download output
  • Load an example to try it
  • Validate & format the input

Example Output

Example: TOML → TypeScript

interface User {
  name: string;
  age: number;
  email?: string;
}

Sources & References

Frequently Asked Questions

How do I convert TOML to TypeScript?

Converting TOML to TypeScript is simple with our free online tool. Just paste or upload your TOML data, click the "Convert to TypeScript" button, and get instant results. The conversion happens in your browser, ensuring privacy and speed. No registration or installation required.

Is this TOML to TypeScript converter free?

Yes! Our TOML to TypeScript converter is completely free to use with no limitations. You can convert unlimited files, and there are no hidden fees, registration requirements, or usage restrictions. All processing happens locally in your browser for maximum privacy.

Can I convert large TOML files to TypeScript?

Yes, our tool can handle TOML files of various sizes. Since the conversion happens in your browser, the limit depends on your device's memory. Most modern browsers can handle files up to several megabytes without issues. For very large files, ensure you have sufficient RAM available.

Is my data safe when converting TOML to TypeScript?

Absolutely! Your data never leaves your device. All TOML to TypeScript conversion happens locally in your browser using JavaScript. We don't upload, store, or transmit your data to any server. This ensures complete privacy and security for sensitive information.

What is the difference between TOML and TypeScript?

TOML (Tom's Obvious Minimal Language) (TOML) and TypeScript interfaces (TypeScript) are different serialization formats, each with its own syntax and strengths. Data often needs to move between them when integrating tools, APIs, or configuration systems that expect a specific format. This converter maps the structure of your TOML onto valid TypeScript so you can use it wherever TypeScript is required.

Can I use this TOML to TypeScript converter on mobile?

Yes! Our TOML to TypeScript converter works perfectly on mobile devices (smartphones and tablets) as well as desktop computers. The responsive design ensures a smooth experience on any screen size. Just open https://tools.seagit.com/toml-to-typescript in your mobile browser.

Does the converter validate my TOML before conversion?

Yes, our tool includes built-in TOML validation. If your TOML data contains syntax errors, you'll receive clear error messages indicating what needs to be fixed. This helps ensure your converted TypeScript output is accurate and valid.

🎓 Pro Tips

  • Tip 1: Validate or format your TOML first (the Validate / Format buttons) so the converter works from clean, TOML v1.0.0-conformant input.
  • Tip 2: Give the tool a representative TOML sample — optional fields are only detected from the keys actually present, so include them if they matter.
  • Tip 3: Authoritative reference for the input format: TOML v1.0.0 — https://toml.io/en/v1.0.0.
  • Tip 4: For the output, follow the TypeScript Handbook (https://www.typescriptlang.org/docs/) conventions in your codebase.