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An online Kotlin compiler lets you write, run, and test Kotlin code instantly in your browser—no installation or setup required. Just open Nottri.com, select Kotlin, and start coding. Whether you're a student, teacher, or developer, our platform provides a fast, accessible, and powerful way to practice, learn, and build projects from anywhere.
Traditional development environments require complex setup processes, dependency management, and often expensive software licenses. With Nottri.com's online Kotlin compiler, you can skip all the hassle and dive straight into coding. Our platform supports the latest Kotlin features, libraries, and frameworks, ensuring you're always working with cutting-edge technology.
Traditionally, online compilers take your code, send it to a remote server, and execute it using standard stdin (for input) and stdout (for output). You write code, click "Run", and see the results in a simple output box. But most platforms only offer basic execution in a shared or restricted environment, limiting what you can do.
The typical workflow involves: writing code in a basic text editor, submitting it to a queue, waiting for execution on shared resources, and receiving limited output. This approach often leads to slow performance, security concerns, and restricted functionality that doesn't reflect real-world development scenarios.
Nottri.com revolutionizes online coding by providing each user with their own isolated Linux environment. This isn't just a code executor—it's a complete development workspace that mirrors professional development environments.
kotlin main.kotlin, pip install, npm install)The inspiration for Nottri.com came from experiencing the frustrations of existing online coding platforms. We identified key pain points that developers, students, and educators face daily:
Most platforms suffer from slow execution, long queue times, and laggy interfaces that interrupt the coding flow.
Shared environments pose security risks, with limited isolation between users and restricted access to system resources.
Basic code runners lack the tools and flexibility needed for real-world development and learning scenarios.
Our solution addresses these challenges by providing a platform that combines the convenience of online access with the power and security of local development environments. We've built Nottri.com to be the platform we wished existed when we were learning to code.
ls, mkdir, grep, etc.)pip, npmStarting your coding journey with Nottri.com is incredibly simple:
Once you sign up on Nottri.com, you’re not just getting a compiler — you're getting a full project development workspace.
Just like GitHub or Replit, you can create new coding projects, organize them, and come back to continue anytime. But here’s what makes Nottri.com even more powerful:
flask run, npm install)Whether you're building a Flask web app, a React frontend, a Python script, or just solving DSA problems — Nottri's powerful editor and real terminal give you all the tools you need.
pip, npm, etc.We believe coding tools shouldn’t be expensive or complicated. That’s why Nottri.com offers one of the most affordable and flexible pricing systems on the internet — way cheaper than Replit, GitHub Codespaces, or any other cloud IDE.
Instead of complicated monthly plans, we use a simple credit-based system:
And here’s the best part…
Your credits are yours forever. Whether you buy 10 or 1000 credits — you can use them anytime, with no expiry date.
This gives you full freedom — pay only when you need power features.
We love consistency — and we reward it!
Every time you log in daily, you build a streak. And here’s what you get:
Even if you don’t buy credits, you can still earn them — just by showing up and learning or coding daily.
We understand that:
That’s why we offer fully custom pricing options:
Just tell us your needs — and we’ll make a plan just for you!
| Feature | Nottri.com | Other IDEs |
|---|---|---|
| Pay-as-you-go | ✅ Yes | ❌ Often No |
| Credit never expires | ✅ Yes | ❌ Mostly expire |
| Bonus on streak | ✅ Yes | ❌ Rare |
| Custom pricing | ✅ Yes | ❌ Limited |
| Hosting / IDE features | ✅ Powerful | 💸 Locked behind expensive plans |
This isn't just a code runner—it's a complete development ecosystem. Whether you're solving complex algorithms, learning a new programming paradigm, building production-ready applications, or teaching the next generation of developers, Nottri.com provides the tools, performance, and flexibility you need to succeed.
Join thousands of developers, students, and educators who have made Nottri.com their go-to platform for online coding. Experience the difference of having a real Linux environment at your fingertips, complete with the power and flexibility of professional development tools, all accessible through your web browser.
Access a full terminal environment, run Linux commands, and manage your project’s dependencies directly within the IDE.
Browse and interact with websites directly within the IDE. Supports real-time interaction with web content without leaving the workspace.
Manage your project files and directories effortlessly within the IDE. Create, edit, rename, move, and delete files—all in one place.
Experience seamless code editing with real-time syntax highlighting, tab support, and intelligent code suggestions for a smoother development workflow.
Kotlin is a modern, statically typed programming language that runs on the Java Virtual Machine (JVM) and is fully interoperable with Java. It is designed to be concise, expressive, and safe, addressing many of Java's limitations while improving productivity.
Kotlin can be installed using the Kotlin website or through package managers. If you have IntelliJ IDEA or Android Studio, Kotlin is already integrated. Otherwise, you can install Kotlin via SDKMAN or Homebrew on macOS:
brew install kotlinKotlin has a concise and expressive syntax. Below is a simple Kotlin program:
fun main() {
println("Hello, World!")
}In this example, fun defines a function, and println prints the string to the console.
In Kotlin, you can define variables using the val keyword for immutable variables and var for mutable variables. Example:
val name: String = "John" // Immutable
var age: Int = 25 // Mutableval creates a constant, while var creates a variable whose value can be changed later.
Functions in Kotlin are declared using the fun keyword. Example:
fun greet(name: String): String {
return "Hello, $name!"
}
fun main() {
println(greet("Alice"))
}The function greet takes a String parameter and returns a greeting message.
In Kotlin, you can define classes with the class keyword and create objects using the new keyword:
class Person(val name: String, var age: Int)
fun main() {
val person = Person("John", 25)
println(person.name)
}Kotlin supports single inheritance. To create a class that inherits from another, use the : symbol. Example:
open class Animal(val name: String)
class Dog(name: String): Animal(name)
fun main() {
val dog = Dog("Rex")
println(dog.name)
}open is used to allow the class to be inherited. The Dog class inherits from the Animal class.
Kotlin has built-in null safety to avoid NullPointerException. You can define nullable types by appending ? to the type. Example:
var name: String? = "John"
name = null // ValidYou can also use the safe call operator (?.) to safely access properties of nullable objects:
val length = name?.length // Returns null if name is nullKotlin supports lambdas and higher-order functions, allowing you to pass functions as arguments. Example:
fun operate(a: Int, b: Int, operation: (Int, Int) -> Int): Int {
return operation(a, b)
}
fun main() {
val sum = operate(3, 4) { x, y -> x + y }
println(sum) // Output: 7
}The operate function takes two integers and a function that defines the operation. Here, a lambda expression is passed to calculate the sum.
Coroutines in Kotlin simplify asynchronous programming by allowing you to write asynchronous code in a sequential manner. Example:
import kotlinx.coroutines.*
fun main() = runBlocking {
launch {
delay(1000L)
println("World!")
}
println("Hello,")
}The runBlocking function is used to run a coroutine in the main function. The launch function starts a new coroutine, and delay simulates a delay.