Online Python Compiler & Algorithm Visualizer (3.9, 3.10, 3.11)
Write, compile, and run Python code instantly in your browser. This free online Python compiler needs no installation or signup — just type your Python program, click Run, and see the output. Supports stdin, multi‑file projects, shareable snippet URLs, and AI help to generate, fix, and explain Python code.
About Online Compiler
Our free online compiler lets you write, compile, and run code instantly in your browser. Supports Python, Java, C++, JavaScript, Go, Rust, and many more languages. No installation required.
Compare Languages Side by Side
Want to see how Python stacks up against another language? Open the Code Playground to run Python next to Python, Go, Rust, or any language — each pane picks its own language and version, and you run them together.
Supported Languages
Popular: Python, Java, C++, C, JavaScript, TypeScript, Go, Rust
Web: PHP, Ruby, Node.js, HTML/CSS
Systems: C, C++, Rust, Go, Swift
Functional: Haskell, Scala, Kotlin, F#, Clojure
Features
- Monaco Editor (VS Code) with syntax highlighting
- Real-time code execution with output streaming
- Custom compiler flags support (-O2, -Wall, etc.)
- Share code via unique snippet URLs
- Keyboard shortcuts (Ctrl+Enter to run)
Run & Visualize Python Online (3.9, 3.10, 3.11)
Write and execute Python in your browser. Supports Python 3.9, 3.10, and 3.11 with popular packages like requests, numpy, and pandas. Plus a built‑in algorithm visualizer: click Visualize to watch your code run line by line as lists, dicts, sets, heaps, trees, linked lists, and graphs animate step by step — ideal for learning sorting, binary search, recursion, and BFS/DFS. Share snippets, stdin, and multi‑file projects.
FAQ
Does it include a Python algorithm visualizer? Yes. Click Visualize to step through your code while lists, dicts, sets, heaps, trees, linked lists, and graphs animate — a built‑in algorithm visualizer that highlights each read and write and the current line.
Which algorithms can I visualize? Sorting (bubble, selection, insertion, merge sort), binary search, two‑pointer techniques, recursion, tree and graph traversals (BFS/DFS), and linked‑list operations — watch the data structures update step by step.
Which Python versions are available? Python 3.9, 3.10, and 3.11 are available.
How do I share code? Click Share to generate a URL that preserves your files, input, and Python version.
Are packages supported? Common packages are available in examples. For portability, prefer self‑contained snippets.
How to Use Online Compiler
Choose from 60+ programming languages including Python, Java, C++, JavaScript, Go, Rust, and more.
Use our Monaco editor (same as VS Code) with syntax highlighting, auto-completion, and error detection.
Click Run or press Ctrl+Enter. Your code executes in a secure sandbox and output appears instantly.
Share your code via unique URL or embed interactive code snippets in your blog, book, or documentation.
For Authors, Educators & Technical Writers
Perfect for programming books, online tutorials, technical documentation, and educational content. Embed interactive, runnable code examples directly in your content.
Click Embed button above to generate embed code for your content!
Example: Hello World in Python
def greet(name):
return f"Hello, {name}!"
print(greet("World"))Copy this Python snippet into the editor above and click Run to execute it instantly — no setup required.
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Need embeds? See Embed Online Compiler.