Free online code formatter and beautifier tool. Format code with proper indentation, spacing, and structure across 20+ programming languages including JavaScript, Python, Java, C++, HTML, CSS, and more.
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Formatted code will appear here...
Clean, consistently formatted code is easier to read, review, and maintain. Our browser-based formatter instantly beautifies messy or minified code across 20+ languages with zero configuration — no signup, no server upload, completely private.
Format code in all major programming languages — from web technologies like JavaScript and HTML to systems languages like C++ and Rust, to data formats like SQL, JSON, and XML.
Our formatter uses advanced parsing algorithms to intelligently format and beautify code while maintaining language-specific syntax rules.
Choose from 20+ languages — or upload a file for auto-detection from the file extension.
Paste your code directly into the input panel or upload a source file from your computer.
Set indent size, spaces vs tabs, semicolons, quote style, and max line length in Advanced Settings.
Click "Format Code" — the formatted output appears instantly with a line and character count comparison.
Copy the formatted code to clipboard or download it as a text file. Your original is never modified.
Discover how our code formatter can help you in various development scenarios with real examples.
function fibonacci(n) {
if (n <= 1) return n;
return fibonacci(n - 1) + fibonacci(n - 2);
}
const numbers = [1,2,3,4,5];
const doubled = numbers.map(n => n * 2);
console.log(doubled);function fibonacci(n) {
if (n <= 1) return n;
return fibonacci(n - 1) + fibonacci(n - 2);
}
const numbers = [1, 2, 3, 4, 5];
const doubled = numbers.map(n => n * 2);
console.log(doubled);def fibonacci(n): if n <= 1: return n return fibonacci(n - 1) + fibonacci(n - 2) numbers = [1, 2, 3, 4, 5] doubled = [n * 2 for n in numbers] print(doubled)
def fibonacci(n):
if n <= 1:
return n
return fibonacci(n - 1) + fibonacci(n - 2)
numbers = [1, 2, 3, 4, 5]
doubled = [n * 2 for n in numbers]
print(doubled)Explore how our tool integrates into modern development workflows and improves code quality.
Format code before submitting for review to ensure consistent style and readability
Maintain consistent coding standards across team members and projects
Format code examples in documentation for better readability and understanding
Improve code readability with proper indentation, spacing, and structure
Make code easier to maintain and modify with consistent formatting
Easier debugging with clear code structure and visual organization
Common questions about formatting and beautifying code online with our free tool.
Our formatter supports 20+ programming languages including JavaScript, TypeScript, Python, Java, C++, C#, PHP, Ruby, Go, Rust, Swift, Kotlin, HTML, CSS, SQL, JSON, XML, YAML, Markdown, and Scala. Select from the language dropdown to apply language-specific indentation rules and conventions.
Yes! You can customize indentation size (2, 4, or 8 spaces), choose between spaces and tabs, set semicolons to always/never, control quote style (single or double), and configure trailing whitespace and final newline preferences to match your team's coding standards.
When you upload a file, the formatter automatically detects the language from the file extension (e.g. .js, .py, .html). For pasted code, you can manually select the language from the dropdown for optimal formatting results.
Absolutely. All formatting is performed locally in your browser using client-side JavaScript. No code is ever transmitted to our servers, stored in a database, or logged in any way. Your source code stays 100% private on your device.
Yes! Once the page has loaded in your browser, the formatter works entirely offline. All formatting logic runs client-side, so no internet connection is needed after the initial page load. Ideal for environments with restricted network access.
Formatting (beautifying) adds proper indentation, consistent spacing, and line breaks to make code readable for humans. Minifying does the opposite — it strips whitespace and shortens identifiers to reduce file size for production deployment. Use our Code Minifier tool when you need to minify.
Yes, our formatter can expand and reformat minified code by adding proper indentation and line breaks. Structurally obfuscated code will also be formatted, though obfuscated variable and function names will remain unchanged since the formatter only adjusts whitespace and structure.
Click the "Upload File" button (or drag-and-drop a file) in the input panel. The formatter accepts source files of any size in all 20+ supported languages. The language is auto-detected from the file extension and the formatted result can be copied or downloaded as a text file.
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