Kotlin Generator
Commercial use OK
380+ models
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Model:
+ GPT-5, Claude, Gemini
Describe a screen or feature and get idiomatic Kotlin 1.9+ - coroutines + structured concurrency, Flow streams, sealed classes, data classes, extension functions. 8 style presets including Android Compose, Spring Boot 3, Ktor, and KMP. Gradle Kotlin DSL snippet emitted when external libs are added.
Explanation
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Result
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Generate Kotlin code with free AI. Android apps and server-side programs.
How to Use Kotlin Generator
1
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Our AI processes your request in seconds using the best open-source models.
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Use this tool via API
Automate this tool from your own code. OpenAI-compatible REST endpoint, Bearer-token auth, no extra SDK required. Token costs match the web interface.
curl -X POST https://api.free.ai/v1/chat/ \
-H "Authorization: Bearer sk-free-..." \
-H "Content-Type: application/json" \
-d '{"model": "qwen-coder", "messages": [{"role": "user", "content": "Write a Python function that reverses a string."}]}'Kotlin Generator — FAQ
Idiomatic Kotlin 1.9+ - coroutines + structured concurrency, Flow for streams, sealed classes for state machines, data classes for DTOs, extension functions for fluency, scope functions used judiciously (let / apply / also). 8 style presets (Android Compose / Android Views / Spring Boot 3 / Ktor / Multiplatform shared / KMP iOS interop / Coroutines / kotlinx.test). Build snippet (Gradle Kotlin DSL) emitted when external libs are pulled in.
Yes - a typical ViewModel + repository + tests costs ~1,700 tokens on Qwen 3 Coder, inside the 2,500 anonymous / 10,000 signed-up daily pool. Premium Claude Sonnet / GPT-5 available per-call for complex Compose UIs or multi-platform code.
JetBrains AI ($10/mo) is built into Android Studio / IntelliJ, which is where most Kotlin happens - best in-IDE experience. Copilot ($10-39/mo) works in IntelliJ via plugin. Cursor ($20/mo) is VS Code-based, less native for Kotlin. Tabnine ($12/mo Dev), Codeium (free + $15/mo Pro). Our tool is browser-based one-shot - describe a screen or feature, get a complete file.
Pick the Android Compose preset. Output is @Composable functions with proper state hoisting (state lives in the caller, not inside the composable), remember + LaunchedEffect for side effects, Modifier chains in the conventional order. Material 3 components by default.
Yes - coroutines are first-class. Output uses suspend functions over callbacks, structured concurrency (no GlobalScope.launch), proper dispatcher selection (Dispatchers.IO for network/disk, Default for CPU, Main for UI updates), coroutineScope for parallel work that should fail-fast together, supervisorScope when child failures should be isolated.
Yes - Flow for cold streams, StateFlow for state holders, SharedFlow for events. Uses flow builders, .stateIn / .shareIn for hot conversions, combine / zip for joining, debounce / distinctUntilChanged for UI-driven flows. Lifecycle-aware collection via collectAsStateWithLifecycle in Compose.
Pick the Spring Boot 3 preset. Output uses Kotlin-idiomatic Spring - constructor injection (no field injection), data classes for DTOs, sealed interfaces for typed responses, coroutine-aware controllers (suspend fun handlers), R2DBC or Spring Data with findById returning nullable types.
Pick the Ktor preset. Output uses embeddedServer(Netty), routing get/respond, content negotiation via kotlinx.serialization, Authentication plugin for auth, status pages for typed error responses. For client work mention Ktor client in your description.
Pick the Multiplatform shared preset. Output uses expect/actual for platform code, lives in commonMain, uses kotlinx.coroutines (multiplatform-safe), kotlinx.serialization, kotlinx.datetime. For iOS interop pick KMP iOS interop.
Pick kotlinx.test or mention Kotest in your description. kotlinx.test output uses runTest for coroutine tests, TestScope.advanceUntilIdle() for time-controlled async, Turbine for Flow assertions. Kotest output uses StringSpec / DescribeSpec / FunSpec depending on style.
Review every output. Coroutine cancellation correctness, Compose recomposition triggers, and lifecycle leaks are common bug classes. For security audits run /code/review/ with security focus, then /code/test/ to generate test coverage before merging.
Yes - POST to /v1/chat/ with the same system prompt this page builds. Useful for Android Studio plugins, build-time scaffolding, or KMP code-generation tooling. Bearer auth, rate-limited. Docs at /api/.
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