Developer Tools Hub
The complete suite of online utilities for modern Python developers.
Not sure which to use? See our Python obfuscator & code-protection comparisons (PyArmor, Nuitka, Cython and more).
Free Online Python Tools
A full suite of browser-based utilities to protect, format, convert, and run your Python code — no installs, no signup.
AST Python Obfuscator
Free online Python obfuscator: rename identifiers, encrypt strings, hide imports and flatten control flow at the AST level. No install, in your browser.
Try nowPython Script Formatter
Format your scripts to comply with PEP 8 standards instantly using Black, Autopep8, or YAPF.
Try nowOnline Python Compiler
Run Python 3.13, 3.12 or 3.11 directly in your browser — pick a version, pip-install packages, and execute instantly. Your code is never uploaded.
Try nowPython Script Minifier
Compress your scripts by removing empty lines, trailing spaces, and comments.
Try nowASCII Art Generator
Convert basic text into stylish ASCII art blocks for terminal headers.
Try nowJupyter Notebook Converter
Convert Jupyter (.ipynb) notebooks into standard (.py) scripts.
Try nowJupyter Notebook Viewer
Open and view Jupyter .ipynb notebooks in your browser — markdown, code, and outputs — with no Python or Jupyter install.
Try nowJupyter Notebook Output Cleaner
Strip saved outputs and execution counts from a Jupyter .ipynb — clean notebooks for git and smaller files, in your browser.
Try nowModernize Python Type Hints
Convert old Python type hints to modern syntax — typing.List → list, Optional[X] → X | None, Union → |. In your browser.
Try nowPython 2 to 3 Converter
Automatically migrate legacy version 2 code to modern version 3 syntax.
Try nowPython AST Viewer
Visualize and explore the Abstract Syntax Tree of your scripts.
Try nowPython to EXE Online
Turn a Python script into a standalone .exe online — a GitHub Actions workflow builds Windows, macOS & Linux executables on real runners. Free.
Try nowcURL to Python Converter
Paste any curl command and instantly get clean Python code for requests, httpx, or aiohttp.
Try nowRuff Linter & Formatter
Run Ruff online — the fast Rust linter & formatter that replaces Flake8, isort and Black. Free, no install, runs in your browser.
Try nowRuff Playground
Check Ruff online free: paste Python and watch ruff check diagnostics, formatting, the AST, tokens and formatter IR update live, with an editable config — all in your browser.
Try nowPython Marshal Encryptor
Compile Python to version-locked marshaled bytecode and get a ready-to-run loader. Pick your target Python version (3.10–3.13). Runs 100% in your browser.
Try nowPython .pyc Decompiler
Decompile a compiled Python .pyc file back to readable source — all versions, running in your browser via WebAssembly. Nothing uploaded.
Try nowPython Bytecode Disassembler
Disassemble Python to CPython bytecode with the dis module — explore opcodes, code objects, jumps and constants. Runs in your browser; nothing uploaded.
Try nowPython Type Checker
Type-check your Python online with mypy — runs 100% in your browser via WebAssembly. Catch type errors before you run the code. Nothing is uploaded.
Try now