First-time setup happens only once and enables lightning-fast offline usage. (~5MB)
Run Python instantly.
No setup. No limits.
PyRun is a high-performance, browser-based Python environment designed for instant experimentation, learning, and sharing. Pure execution, no latency.
Instant Execution
Run Python 3.11+ directly in your browser with zero latency using Pyodide.
Local File Access
Open and edit .py files directly from your machine with Ctrl+O.
Export & Backup
Download single files or full projects as .zip for safe local storage.
Collaboration
Generate shareable links instantly via Ctrl+H and share your logic with the world.
Tailored Experience
Adjust font size, line wrapping, and execution timeouts to suit your workflow.
Responsive Design
A mobile-first IDE that works seamlessly across desktops, tablets, and phones.
Why PyRun?
A fast, private, and zero-setup Python environment built for modern developers who value speed and privacy.
Python 3.11 Powered
Leveraging the power of Pyodide and WebAssembly, PyRun brings the full Python 3.11 standard library to your browser with zero server overhead.
Core Capabilities
- Synchronous stdin support
- Multi-file management
- Persistent local storage
- Performance metrics
- Instant link sharing
- Zero setup required
Shortcuts
Master your workflow with standard bindings.
Your Data, Your Control.
Privacy is not an option—it's the foundation of PyRun. All code execution happens locally in your browser sandbox. No source code or variables ever touch our servers unless you explicitly generate a public share link.