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Used daily across top companies and universities worldwide

APIs, Editor embedding & more

Designed from first principles for instant execution speed, retro delight, and AI crash diagnosis.

Instant Editor & Challenges

Zero setup. Monaco Editor in your browser with full syntax highlight, autocomplete, sound FX, multi-tab files, and responsive touch controls.

APIs to Run Code

Execute code across C, C++, Python, Java, JavaScript, and Go in sub-200ms with process sandbox isolation and standard input (stdin) piping.

Custom Workflows & Auto-Fix

Integrated Cloud AI code synthesis: automatic root-cause crash explanations, 1-click code repair, and instant code cleansing.

State-of-the-art coding agents
in your browser.

The agent in Zero Compiler lives directly inside your workspace. When your code crashes, click "Why did my code crash?" and watch the AI Agent diagnose the root cause and synthesize working code in seconds. Nothing to install.

OPEN WEB IDE NOW ⚡ TEST CRASH DIAGNOSTIC
Zero Compiler — main.c // [C GCC 13]
LIVE AI AGENT
// Sample C Program with Missing Semicolon
#include <stdio.h>

int main() {
    printf("Hello, Neo-Brutalist World!\n") // <- syntax error
    return 0;
}
Why did my code crash?

AI Agent Diagnosis: A syntax error occurred at line 4. C requires every statement to conclude with a semicolon (;). The printf(...) call is missing its terminating semicolon before return.

[ C // EXIT: 1 ] ● CRASH AUTO-DETECTED
Matched to your flow
Zero context switching. Diagnostics live right inside the terminal tab.
1-Click Auto-Fix
Automatically applies synthesized code back to Monaco Editor with one tap.
Root cause insights
Learn why your code failed with clear, human-readable technical breakdowns.
Zero setup required
No GCC, Python, or JDK installations needed to compile and run code.
100% Mobile & iPad Ready
Touch-friendly drag resizer and fluid vertical layouts across phones and tablets.
Darryl Pixel Aesthetic
Neo-brutalist eggshell parchment, tactile ink drop-shadows, and neon cyber-lime.
Supported by modern open-source compilers and developer tooling
GCC 13 Python 3.11 Node.js LTS OpenJDK 21 Go 1.22 Monaco Editor Cloud AI Intelligence GitHub CI/CD Render Cloud

03 // DEVELOPER ACCESS & AI UNLOCK

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By continuing, you agree to our User Agreement and acknowledge that you understand the Privacy Policy.

📜 ZERO COMPILER USER AGREEMENT

Last updated: September 2026. Welcome to Zero Compiler. By creating an account, running code, or accessing our services, you agree to abide by this User Agreement.

1. Code Ownership & Intellectual Property

You retain 100% full ownership, copyright, and licensing rights to all source code, algorithms, logic, and solutions you write or compile within Zero Compiler. Zero Compiler does not claim ownership over any user code.

2. Acceptable Use & Security Guidelines

Zero Compiler runs user code in isolated runtime sandboxes. You agree NOT to:

  • Execute malicious code, malware, worms, ransomware, or cryptomining bots.
  • Attempt network scans, port attacks, or denial-of-service against the host platform or external servers.
  • Attempt sandbox escape, privilege escalation, or unauthorized access to system resources.

3. AI Agent Diagnostics & Auto-Fix Disclaimer

Our AI Assistant, "Why Did My Code Crash?", and 1-Click Auto-Fix tools use advanced large language models to diagnose compiler errors and synthesize solutions. While designed for high accuracy, AI-generated fixes are provided "as-is" without warranty. Users should review code suggestions before production deployment.

4. Service Availability & Termination

Zero Compiler is provided free of charge for educational, developmental, and professional coding. We reserve the right to limit or terminate access to accounts that violate sandbox security guidelines or abuse API rate limits.

🔒 ZERO COMPILER PRIVACY POLICY

Last updated: September 2026. Zero Compiler values developer privacy. This document outlines how your data is handled.

1. Information We Collect

  • Account Details: If you sign in via Google, GitHub, or Email, we store your display name, email address, and avatar in your local session to identify you across visits.
  • Code Execution Payloads: Source code sent via the "Run Code" command is processed in a temporary runtime container solely to return standard output and error streams. Code is not indexed or sold.

2. AI Processing Transparency

When you use "Why did my code crash?" or "1-Click Auto-Fix", the compiler error snippet and relevant lines are transmitted securely via encrypted HTTPS to Google Gemini AI API solely for real-time error analysis. Your code is not used to train foundational AI models.

3. Local Storage & Cookies

Zero Compiler uses browser local storage (`localStorage`) to remember your editor preferences, theme selection, custom tab names, and active session tokens locally on your device without tracking cookies across external websites.

4. Data Control & Deletion

You have full control over your session. Clicking "Log Out" immediately purges your authentication session and cached credentials from your browser.