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Code Beautify
codebeautify.org › python-formatter-beautifier
Python Formatter and Beautifier
Python Beautifier Online works well on Windows, MAC, Linux, Chrome, Firefox, Edge, and Safari.
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Pep8
pep8.org
PEP 8: The Style Guide for Python Code
This stylized presentation of the well-established PEP 8 was created by Kenneth Reitz (for humans) · This document gives coding conventions for the Python code comprising the standard library in the main Python distribution. Please see the companion informational PEP describing style guidelines ...
People also ask

Is it safe to paste my Python code into an online formatter?
Code is sent to a secure backend over HTTPS and processed transiently for formatting. However, as a best practice you should avoid sending passwords, API keys, personal data or highly confidential business logic to any online tool. For sensitive projects, run Black locally or inside your own CI environment instead.
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encode64.com
encode64.com › home › formatters › python formatter
Free Online Python Formatter – Black & PEP 8 Style Code Beautifier ...
What line length should I choose when formatting Python code?
PEP 8 suggests 79 or 99 characters, while Black’s default is 88. Many teams use 88, 100 or 120 depending on their screens and preferences. The important part is to pick a single value and apply it consistently everywhere.
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encode64.com
encode64.com › home › formatters › python formatter
Free Online Python Formatter – Black & PEP 8 Style Code Beautifier ...
How is this different from a Python linter?
A formatter rewrites code to follow a consistent style automatically. A linter (such as Ruff or Flake8) analyzes code for potential bugs, complexity and style violations. Most teams run both: the formatter for layout, the linter for deeper quality checks.
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encode64.com
encode64.com › home › formatters › python formatter
Free Online Python Formatter – Black & PEP 8 Style Code Beautifier ...
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Pyrfecter
pyrfecter.com › format-python-code
Format Python code online · Pyrfecter
June 26, 2025 - autopep8 formats Python code according to PEP 8 - Style Guide for Python Code. It builds on top of pycodestyle (formerly known as "pep8") by automatically fixing issues that pycodestyle finds.
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Python
peps.python.org › pep-0008
PEP 8 – Style Guide for Python Code | peps.python.org
This document gives coding conventions for the Python code comprising the standard library in the main Python distribution. Please see the companion informational PEP describing style guidelines for the C code in the C implementation of Python.
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Codewof
codewof.co.nz › style › python3
Python 3 Style Checker for beginners - codeWOF
This style checker will check your code against the main conventions recommended for Python in PEP 8 (Style Guide for Python Code) and PEP 257 (Docstring Conventions). Fine tuning your code to pass these common conventions makes it easy for others to read your Python code · Privacy notice: ...
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Minifier
minifier.org › python-beautifier
Minify JS and CSS online, or include the minifier in your project for on-the-fly compression.
Python beautifier is a free online tool that automatically formats messy, unindented, or hard-to-read Python code into a clean, consistent format. It follows PEP8, the official Python style guide, to ensure best practices in code readability.
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Herokuapp
pep8ci.herokuapp.com
CI Python Linter
CI Python Linter · Settings: · Results: · All clear, no errors found
Find elsewhere
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Encode64
encode64.com › home › formatters › python formatter
Free Online Python Formatter – Black & PEP 8 Style Code Beautifier | Encode64
Clean up your Python code in one click with a Black-style formatter. This online tool enforces consistent indentation, spacing and line length so your scripts, APIs and notebooks stay readable, reviewable and PEP 8–friendly.
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PyPI
pypi.org › project › pep8
pep8 · PyPI
Add the Sphinx-based documentation, and publish it on http://pep8.readthedocs.org/. (Issue #105)
      » pip install pep8
    
Published   Oct 24, 2017
Version   1.7.1
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DataCamp
datacamp.com › tutorial › pep8-tutorial-python-code
PEP-8: Python Naming Conventions & Code Standards | DataCamp
April 11, 2023 - On top of the handy pep8 module and the coala package, you can also check whether your Python code is PEP-8 compliant by going to pep8online. This site has an online editor which allows you to just paste in your code, press the "Check code" button! As a result, you'll get some feedback on what ...
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Online IDE
online-ide.com › online_python_syntax_checker
Online Python Syntax Checker - OnlineIDE
Build and Run your Python code using OnlineIDE. Quick and easy tool that helps you to build, compile, test your python programs online.
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Draftable
draftable.com › compare
Compare Two Documents Online(Word, PDF, Text files). Text Comparison | Draftable
Using our online diff checker software, you can compare any two PDF files, Word documents, Excel spreadsheets, PowerPoint presentations and plain text. You can even compare a PDF file with a Word document, side-by-side.
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GitHub
github.com › astral-sh › ruff
GitHub - astral-sh/ruff: An extremely fast Python linter and code formatter, written in Rust. · GitHub
2 weeks ago - pep8-naming · pydocstyle · pygrep-hooks · pylint-airflow · pyupgrade · tryceratops · yesqa · For a complete enumeration of the supported rules, see Rules. Contributions are welcome and highly appreciated. To get started, check out the contributing guidelines.
Starred by 46.2K users
Forked by 1.8K users
Languages   Rust 96.4% | Python 2.7% | TypeScript 0.8% | Shell 0.1% | CSS 0.0% | HTML 0.0%
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Vercel
black.vercel.app
Black Playground
Playground for Black, the uncompromising Python code formatter.
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JetBrains
jetbrains.com › pycharm
PyCharm: The only Python IDE you need
June 2, 2021 - Built for web, data, and AI/ML professionals. Supercharged with an AI-enhanced IDE experience.
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Reddit
reddit.com › r/learnpython › easy, free to use online formatter for python code with configuration options?
r/learnpython on Reddit: Easy, free to use online formatter for Python code with configuration options?
July 13, 2024 -

I am searching for a formatter for Python3 which takes a few simple styling parameters and yet is very easy to use. All I found so far where tons of formatters, which ansolutely enforce one and only one formatting style.

Example input:

def deleteSubnet(ipAddress, cidrMask, interface = defaultNetworkInterface):
    if subprocess.run(["ip","a","d",ipAddress+"/"+cidrMask,"dev",interface], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL).returncode != 0:
        quit(color.red+" ERROR:"+color.stop+" IP could not be cleared. You need to manually remove "+color.blue+ipAddress+"/"+cidrMask+color.stop+" from "+color.blue+interface+color.stop+"!!! Terminating...")
    print(color.green+" Success: deleted IP "+color.stopcolor.blue+ipAddress+"/"+cidrMask+color.stop+" from interface "+color.blue+interface+color.stop+".")

Example output (NOT WANTED):

def deleteSubnet(ipAddress, cidrMask, interface=defaultNetworkInterface):
    if (
        subprocess.run(
            ["ip", "a", "d", ipAddress + "/" + cidrMask, "dev", interface]
            stdout=subprocess.DEVNULL,
            stderr=subprocess.DEVNULL,
        ).returncode
        != 0
    ):
        quit(
            color.red
            + " ERROR:"
            + color.stop
            + " IP could not be cleared. You need to manually remove "
            + color.blue
            + ipAddress
            + "/"
            + cidrMask
            + color.stop
            + " from "
            + color.blue
            + interface
            + color.stop
            + "!!! Terminating..."
        )
    print(
        color.green
        + " Success: deleted IP "
        + color.stopcolor.blue
        + ipAddress
        + "/"
        + cidrMask
        + color.stop
        + " from interface "
        + color.blue
        + interface
        + color.stop
        + "."
    )

Yes it is ugly. Does not matter. If reddit does word-wrap the lines, it will be horrible. But if the line just overflows, it just looks great for me.

All I want to do is a simple tool that understands the indentations and allows me to configure a target indentation. I do not care for the standard that tools like pylint try to enforce - i dislike it.

However what is way worse than not breaking lines, is uneven indentations. And that I need to fix - but please not manually. Is there an easy to use tool, that can fix my *variable* indentations to exactly 2 spaces per indent without changing the rest of the content of the lines? (yes I want 2 spaces, period)

For javascript there are amazing tools, like beautifier.io which handles it perfectly. Why can't I find something like that for python? And yes, I prefer a simple online tool actually, that does not require a login or download.

As to why it is uneven: It is a copy&paste collection from different sources.

Thanks for your help.

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Real Python
realpython.com › ref › glossary › pep-8
PEP 8 | Python Glossary – Real Python
It outlines coding conventions for writing clear, readable Python code that’s consistent with the core Python codebase. PEP 8 can be read online in the Python Enhancement Proposal (PEP) database at peps.python.org/pep-0008 or at pep8.org.
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EditorConfig
editorconfig.org
EditorConfig
EditorConfig is a file format and collection of text editor plugins for maintaining consistent coding styles between different editors and IDEs.