Browser-Native C++ IDE

Write C++.
Compile. Run.
All in the Browser.

A full-featured C++ development environment that lives entirely in your browser - no install, no server, no waiting. Powered by WebAssembly and Monaco Editor.

Launch IDE View on GitHub
main.cpp - Zenith C++
// Zenith C++ - Browser-Native IDE
#include <iostream>
#include <vector>
#include <algorithm>
 
int main() {
  std::vector<int> nums = {5, 2, 8, 1, 9};
  std::sort(nums.begin(), nums.end());
  for (auto n : nums)
    std::cout << n << " ";
  return 0;
}
$ zenith compile main.cpp
✓ Compiled in 42ms
1 2 5 8 9
Exit code: 0

Why Zenith

Everything you need.
Nothing you don't.

Built for C++ developers who want a frictionless environment - from first keystroke to compiled output.

100% Browser-Native

No installs, no sign-ups, no servers. Open the URL and start writing C++ immediately. Works fully offline once loaded.

WebAssembly Powered

JSCPP interprets C++ instantly for rapid iteration. Full Clang/LLVM compiled to Wasm delivers production-grade compilation.

Monaco Editor

The same editor engine that powers VS Code. Full C++ IntelliSense, syntax highlighting, and keyboard shortcuts baked in.

Live Terminal

Real Xterm.js terminal output with full ANSI color support. See stdout, stderr, and exit codes exactly as you would locally.

Private by Design

Your code never leaves the browser. All compilation and execution happens locally via WebAssembly - zero telemetry.

Configurable

Custom compiler flags, font size, word wrap, and execution timeout - all adjustable from the built-in settings panel.

Workflow

From idea to output
in three steps.

Zenith strips away every friction point between writing and running your code.

1

Write

Open the Monaco editor with C++ syntax highlighting, autocomplete, and error squiggles - ready instantly.

2

Compile

Hit Run or press Ctrl+Enter. JSCPP compiles in milliseconds; Wasm-Clang handles the rest.

3

Run

Instant output in the live terminal. See stdout, stderr, exit codes, and execution time - all in real time.

Tech Stack

Built on proven foundations.

JSCPP Interpreter
Clang / LLVM → Wasm
Monaco Editor v0.47
Xterm.js v5
Web Workers
SharedArrayBuffer
COEP / COOP Headers
C++17 Standard

The Creator

Built with care.

Zaki Ul Hassan

Vanilla Web Developer

Passionate about developer tooling, AI, and bringing native-quality development experiences to the web. Zenith C++ is a project born from the idea that great tools should be frictionless.

HTML5 CSS3 Vanilla JS C++ Python

Get started now

Start coding C++
in seconds.

No account. No install. Just open Zenith C++ and start building.

Open Zenith C++