Python Code Formatter
Format and beautify your Python code instantly with our free online tool
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How Python Code Formatter Works
Format your Python code in three simple steps
Paste Your Code
Copy your unformatted or messy Python code and paste it into the input editor. The formatter supports standard Python syntax and common formatting patterns.
Click Format
Hit the "Format Code" button and watch as our intelligent formatter instantly restructures your code with proper indentation, spacing, and Python best practices.
Copy or Download
Your beautifully formatted code appears in the output panel. Copy it to your clipboard with one click or download it as a .py file for immediate use in your projects.
Python Formatting Best Practices
Writing clean, readable, and PEP 8-compliant Python code improves maintainability, debugging, collaboration, and overall code quality.
1. Follow PEP 8 Indentation
Maintain consistent indentation throughout your Python code:
- Use 4 spaces per indentation level as per PEP 8.
- Helps readability, avoids syntax errors, and ensures consistent formatting.
2. Use Meaningful Variable and Function Names
Choose descriptive names for variables, functions, and classes:
- Improves code readability and understanding.
- Supports maintainability and collaboration in teams.
3. Keep Lines Short and Readable
Limit lines to 79–99 characters per PEP 8 guidelines:
- Prevents horizontal scrolling and improves readability.
- Break long expressions or strings across multiple lines with proper indentation.
4. Use Comments and Docstrings Wisely
Document your code for clarity:
- Use inline comments sparingly and explain why, not what.
- Use docstrings for functions, classes, and modules.
5. Organize Imports
Group and order imports consistently:
- Standard libraries first, then third-party, then local imports.
- Improves clarity and avoids circular import issues.
6. Validate and Test Your Code
Always check for syntax errors and test functionality:
- Use linters, formatters, and unit tests.
- Prevents runtime errors and ensures code reliability.
Before Formatting
def fibonacci( n ):
result=[0,1]
for i in range(2 ,n):
next_val = result[i-1]+result[i-2]
result.append( next_val )
return result
def filterEvenNumbers(numbers ):
even=[]
for num in numbers:
if(num%2==0):
even.append(num)
else: pass
return even
nums=fibonacci(10)
evens=filterEvenNumbers( nums )
more_nums=[1,2,3,4,5,6,7,8,9,10]
more_evens=filterEvenNumbers( more_nums )
print("Fibonacci:",nums)
print("Even numbers:", evens)
print("Another set of evens:",more_evens)
After Formatting
def fibonacci(n):
result = [0, 1]
for i in range(2, n):
next_val = result[i - 1] + result[i - 2]
result.append(next_val)
return result
def filterEvenNumbers(numbers):
even = []
for num in numbers:
if num % 2 == 0:
even.append(num)
else:
pass
return even
nums = fibonacci(10)
evens = filterEvenNumbers(nums)
more_nums = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
more_evens = filterEvenNumbers(more_nums)
print("Fibonacci:", nums)
print("Even numbers:", evens)
print("Another set of evens:", more_evens)
Why Python Formatting Matters
Properly formatted Python code is easier to read, debug, and maintain. It reduces errors and ensures consistency across projects.
- Readable Python code improves collaboration and maintainability.
- Consistent formatting reduces syntax and runtime errors.
- Follows best practices and PEP 8 guidelines.
- Encourages professional and clean coding habits.
Python Code Formatter Features & Benefits
Why developers choose our Python formatter
Lightning Fast
Instant code formatting with zero wait time. Process large files in milliseconds directly in your browser without any server delays.
100% Private & Secure
Your code never leaves your browser. All formatting happens client-side, ensuring complete privacy and security for your sensitive code.
Industry Standards
Follows Python community best practices and coding standards. Produces clean, readable code that passes linting rules and code reviews.
Smart Indentation
Automatically detects and applies proper indentation levels for nested structures, functions, objects, and arrays for optimal readability.
Fully Responsive
Works seamlessly on desktop, tablet, and mobile devices. Format code anywhere, anytime with a consistent experience across all screen sizes.
Completely Free
No subscriptions, no hidden fees, no registration required. Use it unlimited times for personal and commercial projects without any restrictions.
No Installation
Zero setup required. Start formatting immediately without downloading software, installing packages, or configuring development tools.
Dark Mode Support
Easy on the eyes with a beautiful dark mode option. Toggle between light and dark themes for comfortable coding sessions day or night.
Who Should Use This Python Formatter Tool?
This Python formatter is designed for developers, teams, and learners who write, debug, or maintain Python code in scripts, projects, and applications.
Frontend & Backend Developers
Format Python code used in web applications, APIs, and scripts to improve readability, maintainability, and debugging efficiency.
Data Scientists & Engineers
Maintain clean and readable Python scripts for data analysis, machine learning, and scientific computing.
DevOps & Automation Engineers
Ensure consistent Python scripts for automation, CI/CD pipelines, and infrastructure management.
Students & Learners
Learn proper Python formatting, understand PEP 8 best practices, and practice writing readable and maintainable code.
Team Leads & Collaborators
Enforce consistent Python formatting across teams to improve collaboration, reduce errors, and maintain coding standards.
Open Source Contributors
Submit clean and readable Python code that aligns with project standards and community best practices.