Run C++, Python, Java, JavaScript, SQL and Bash directly from any device. No setup, no signup. Save snippets locally, share via URL, and jump straight into real online assessment questions when you’re ready.
#include <iostream>
using namespace std;
int main() {
cout << "Hello, world!" << endl;
return 0;
}print("Hello, world!")public class Main {
public static void main(String[] args) {
System.out.println("Hello, world!");
}
}console.log("Hello, world!");SELECT 'Hello, world!' AS greeting;
echo "Hello, world!"
Yes. The OAHelper IDE is completely free. Write, compile and run code in C++, Python, Java, JavaScript, SQL and Bash directly in your browser - no installation, no signup required.
The IDE supports C++, Python, Java, JavaScript (Node.js), SQL (SQLite), PostgreSQL and Bash. You can switch languages from the dropdown at the top of the editor.
No. You can run code as a guest. Sign in only if you want to save submissions, track progress on practice questions, or unlock the OA question bank.
Yes. Click the Share button to copy a link that encodes your code in the URL. Anyone who opens the link will see the same code in the editor.
The OAHelper IDE runs in the browser, so it works on any device - including phones, tablets and Chromebooks. It is purpose-built for online assessment practice and pairs with our library of real OA questions from top tech companies.
Code is executed in a sandboxed environment via OAHelper's execution backend. We do not store guest code on our servers; your work is saved in your browser's localStorage so it survives a page refresh.
Yes. Use the Stdin panel on the right side of the editor to pass input. Your program reads it through standard input (e.g. input() in Python or cin in C++).