Convert TOML to Kotlin online, free. TOML is a readable configuration format built around key/value pairs and tables. Kotlin data classes model structured data with null-safety. TOML to Kotlin 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 Kotlin types as data classes with nullable types following the Kotlin docs 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 Android apps, Ktor services and kotlinx.serialization.
It maps the full structure of your TOML onto idiomatic Kotlin types, following the Kotlin docs conventions. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.
Paste TOML and generate Kotlin types from Kotlin immediately. Conversion runs client-side, so there is no upload wait and large documents stay fast.
Nested TOML objects, tables and arrays are mapped faithfully onto Kotlin, including nested types and optional fields.
Your TOML never leaves your device — everything is processed locally in JavaScript, with nothing logged or stored.
Unlimited conversions with no account, no quotas, and no watermark. Works on desktop and mobile.
Example: TOML → Kotlin
@Serializable
data class User(
val name: String,
val age: Int,
val email: String? = null,
)Converting TOML to Kotlin is simple with our free online tool. Just paste or upload your TOML data, click the "Convert to Kotlin" button, and get instant results. The conversion happens in your browser, ensuring privacy and speed. No registration or installation required.
Yes! Our TOML to Kotlin 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.
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.
Absolutely! Your data never leaves your device. All TOML to Kotlin 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.
TOML (Tom's Obvious Minimal Language) (TOML) and Kotlin data classes (Kotlin) 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 Kotlin so you can use it wherever Kotlin is required.
Yes! Our TOML to Kotlin 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-kotlin in your mobile browser.
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 Kotlin output is accurate and valid.