Free code formatter — beautify HTML, CSS, and JavaScript code online. Free code formatting tool with custom indentation.
Format and beautify HTML, CSS, and JavaScript code with custom indentation options. Works 100% in your browser.
Language:
Indent:
Input Code
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Formatted Output
Formatted code will appear here
Disclaimer: This tool processes all data locally in your browser. No code is sent to any server. The formatter provides standard beautification and may not handle all edge cases of complex code structures.
What the Code Formatter Does and Why It Matters
The Code Formatter beautifies HTML, CSS, and JavaScript by applying consistent indentation, spacing, and line breaks. Paste minified or messy code and it returns a readable, well-structured version.
Consistent formatting makes code easier to read, review, and debug, and it reduces noise in version-control diffs. This tool is handy for tidying a snippet from a tutorial, un-minifying a file you need to inspect, or standardising code before pasting it into a ticket.
How to Use Code Formatter
Paste your HTML, CSS, or JavaScript into the input area.
Select the language if it is not detected automatically.
Choose your indentation preference (spaces or tabs, and size).
Run the formatter to produce beautified output.
Review the structured result for readability.
Copy the formatted code back into your editor.
Supported Inputs and Limitations
Supported input
HTML markup
CSS stylesheets
JavaScript source
What you get
Re-indented, readable code
Consistent spacing and line breaks
Copy-ready formatted output
Known limitations
Formatting changes layout only; it does not fix logic errors or invalid syntax.
Severely broken code may not format correctly until the syntax error is resolved.
It standardises style but cannot infer your project’s specific lint rules.
Privacy and Security
Your code is formatted locally in the browser and is never sent to NovaTools or any server. Nothing is stored once you leave the page, which makes it safe to tidy proprietary snippets without an upload step.
Frequently Asked Questions
Does formatting change what my code does?
No. It only adjusts whitespace, indentation, and line breaks. The behaviour of valid code is unchanged; if anything looks different, it was a pre-existing issue revealed by clearer formatting.
Can it format minified code?
Yes. Pasting minified HTML, CSS, or JavaScript and formatting it produces a readable version, which is useful when you need to inspect a compressed file.
Is my code uploaded anywhere?
No. Formatting runs entirely in your browser, so even proprietary code never leaves your device.
Code formatting is essential for maintaining readable and maintainable code. This free online tool beautifies your HTML, CSS, and JavaScript code by applying consistent indentation and formatting rules. Whether you're cleaning up minified code or standardizing your project's style, this formatter helps you achieve professional-looking code instantly.
How to Use
Select your code language (HTML, CSS, or JavaScript) from the dropdown.
Choose your preferred indentation: 2 spaces, 4 spaces, or tabs.
Paste your code into the input area.
Click Format to beautify your code.
Use Copy to copy the result or Download to save as a file.
Frequently Asked Questions
Which languages does this formatter support?
This tool supports HTML, CSS, and JavaScript. Each language has its own specific formatting rules optimized for that syntax.
Is my code kept private?
Yes, completely. All formatting happens locally in your browser. No code is ever transmitted to any server or stored anywhere.
Can I format minified code?
Yes, the formatter works well with minified code. It will add proper line breaks and indentation to make the code readable again.
What's the difference between the indent options?
2 spaces is common in JavaScript projects, 4 spaces is often used in Python and traditional coding styles, and tabs allow each developer to set their preferred viewing width in their editor.
Does the formatter validate my code?
The formatter performs basic syntax checking and will show an error if your code has obvious issues, but it's primarily a formatting tool, not a full validator.
Recommended next reading
Use these practical guides to understand when this tool is the right choice, what to check before exporting, and which workflow usually comes next.
