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, then download standalone Python.
Try nowPython Script Formatter
Format Python to PEP 8 instantly with Black, autopep8, YAPF or isort — with a before/after diff view and Black options (keep quotes, no magic comma).
Try nowOnline Python Compiler
Run Python 3.14, 3.13, 3.12 or 3.11 directly in your browser — pick a version, pip-install packages, and execute instantly.
Try nowPython Script Minifier
Minify Python with python-minifier: strip comments, docstrings and annotations, rename variables, hoist literals and combine imports — with per-option toggles and a live size readout.
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
Paste a Python script and download a standalone Windows .exe — a real PyInstaller build, no install. Plus a command & GitHub Actions generator for macOS/Linux and dependencies.
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
A deep Ruff playground: inspect the AST and token stream Ruff parses, its formatter IR, and live ruff check diagnostics, while editing the Ruff config and sharing a link that reopens your exact setup.
Try nowPython Marshal Encryptor
Compile Python to version-locked marshaled bytecode with optional zlib or zstd compression and get a ready-to-run loader. Target Python 3.10–3.14. Runs 100% in your browser.
Try nowPython .pyc Decompiler
Decompile a compiled Python .pyc back to readable source with pycdc — in your browser via WebAssembly. Python 3.0–3.12 clean, 3.13/3.14 supported.
Try nowPython Bytecode Disassembler
Disassemble Python to CPython bytecode with the dis module — explore opcodes, code objects, jumps and constants. Runs in your browser.
Try nowPython Type Checker
Type-check your Python online with mypy — runs 100% in your browser via WebAssembly. Pick a target Python version (3.8–3.14) and strict mode.
Try nowCode to Flowchart
Turn Python code into a flowchart from the real AST — deterministic, no AI. Handles if, match, loops, try/except and async, with a control-flow-graph mode, unreachable-code highlighting, and Mermaid/SVG/PNG export.
Try now