Free Code Formatting Tools for Developers (HTML, CSS, JS, JSON)
Clean code is easy to read, simple to fix, and fast to share. When your code looks messy, it becomes hard to understand or debug. This is why developers use free code formatting tools. These tools help you fix spacing, correct indentations, and make your code look neat in one click.
In this guide, you will see the best free code formatting tools for HTML, CSS, JavaScript, and JSON. All tools are tested, easy to use, and safe. You can open them in any browser without downloading anything.
Why Code Formatting Matters
Formatting your code helps you:
Read and understand code faster
Fix errors with ease
Make your project look clean
Share code with your team
Work with large files
Save time by not fixing indentation manually
Clean code also builds trust when you share your work with clients or other developers.
✅ Best Free Code Formatting Tools (With Links)
Below are the top tools you can use to clean and beautify your code. Each tool supports major languages like HTML, CSS, JS, and JSON.
1. FreeFormatter.com – Multi-Language Code Formatter
🔗 https://www.freeformatter.com/formatters.html
FreeFormatter.com offers many code beautifiers. It formats HTML, CSS, JavaScript, JSON, XML, SQL, and more. It is simple, fast, and ideal for developers who work with mixed file types.
2. TextMagic Free Source Code Formatter
🔗 https://freetools.textmagic.com/source-code-formatter
This tool formats HTML, XML, CSS, JavaScript, PHP, and JSON. You paste your messy code, click a button, and it becomes clean. It also highlights syntax for easy reading.
3. Prettier – One of the Most Popular Code Formatters
Prettier is trusted by millions of developers. It supports JavaScript, TypeScript, JSX, JSON, HTML, CSS, and more. Prettier gives consistent results every time and is used in many projects worldwide.
4. Code Beautify – All-in-One Developer Tools
Code Beautify provides free tools for formatting, editing, viewing, minifying, and validating code. It supports almost every language including HTML, CSS, JS, JSON, XML, and SQL. It is great for daily use.
5. JavaScript Beautifier (Beautifier.io)
Beautifier.io focuses on JavaScript formatting. It also supports HTML and CSS. It is open-source and gives smooth results for complex code.
6. HTML-CSS-JS Online Editor
This tool lets you write and test HTML, CSS, and JS code live. It also formats your code in real time, which is great for learning or testing small projects.
7. Shadcn.io Code Formatter & Syntax Highlighter
🔗 https://www.shadcn.io/tools/code-formatter
This tool formats and highlights code for JavaScript, Python, HTML, CSS, JSON, Java, Go, Rust, and more. It is clean, fast, and simple to use.
8. Ovdss JavaScript Formatter
🔗 https://ovdss.com/Web-Developer
A fast online formatter for JavaScript. You can paste your JS code, choose your settings, and get clean code right away. Good for jQuery and ES6 code.
9. JSON Formatter (JSONFormatter.org)
🔗 https://jsonformatter.org/formatter-tools-online
A simple and friendly tool for formatting, validating, and sharing JSON data. Perfect for developers who work with APIs.
10. DesignModo Code Cleaners
🔗 https://designmodo.com/website/tools
DesignModo offers free tools to beautify HTML, CSS, JS, and JSON. It improves readability and keeps your code neat and well-structured.
11. CodeShack JavaScript Formatter
🔗 https://codeshack.io/javascript-formatter
A clean and easy tool for formatting JavaScript. It improves code readability and avoids errors.
12. CodeUtility Code Beautifier
🔗 https://beautifycode.codeutility.io
A powerful online code beautifier that formats JS, HTML, CSS, Python, PHP, C, C++, SQL, and more. It works in the browser and gives fast results.
13. Site24x7 HTML Beautifier
🔗 https://www.site24x7.com/tools/html-beautifier
This tool fixes messy HTML code. It makes your markup easy to read and well-structured.
14. Rune Codes – Code Formatter
🔗 https://rune.codes/Developer-Tools
Rune supports more than 19 programming languages including HTML, CSS, JS, JSON, Python, Java, and C++. It is powered by Prettier.
15. GeeksforGeeks Online Code Formatter
🔗 https://www.geeksforgeeks.org/utilities/online-code-formatter
This tool reformats your code based on clean coding rules. It supports many languages and is very beginner-friendly.
16. Hilite.me Syntax Highlighter
This tool turns your code into beautiful colored snippets. It is great for blog posts and documentation.
17. FreeDataFormatter.com
🔗 https://www.freedataformatter.com
A complete suite of formatting tools for HTML, JSON, XML, and many other data formats.
18. Awesome Code Formatters (GitHub List)
🔗 https://github.com/rishirdua/awesome-code-formatters
A curated list of the best open-source code formatting libraries. Perfect for developers looking for advanced tools.
19. The IT Programmers – Online Code Formatter
🔗 https://theitprogrammers.com/online-code-formatter
Paste your HTML, CSS, JS, or JSON code and get a clean layout instantly. It is easy and fast.
20. MyWebUtils Code Formatter
🔗 https://www.mywebutils.com/code-formatter
This tool formats JS, JSON, HTML, CSS, and more. It helps make your code readable with one click.
21. Formatter.org – Multi-Language Code Beautifier
Supports Java, Python, C#, C++, SQL, JavaScript, HTML, XML, CSS, JSON, and many others.
22. JSON Formatter & Validator
🔗 https://jsonformatter.curiousconcept.com
Great for debugging, validating, and formatting JSON files.
23. DevToolLab – Code Tools
🔗 https://devtoollab.com/tools
A hub of free developer tools including JSON formatting, XML conversion, minifiers, and more.
24. Unminify
A simple tool to unminify JS, CSS, HTML, XML, and JSON code.
25. Help-Tools Code Formatter
🔗 https://help-tools.com/developers/code-formatter
Formats HTML, JSON, CSS, and JavaScript without storing your data.
26. WebFormatter HTML Formatter
🔗 https://webformatter.com/html
A fast formatter for HTML, XML, CSS, JavaScript, and JSON.
27. JSON Beautifier (WebThemez)
🔗 https://webthemez.com/code-beautify
Formats and beautifies JSON for easy reading.
28. JSONFormatter.org Tools
A complete JSON suite for validation, conversion, and formatting.
29. Biome – Fast Code Formatter
A modern tool for JavaScript, TypeScript, CSS, JSON, HTML, and more. Very fast and reliable.
30. Codify Formatter
Supports HTML, CSS, JS, JSON, XML, Java, and many more file types. Very simple interface.
Conclusion
Clean code makes development faster and more enjoyable. With the tools listed above, you can format HTML, CSS, JavaScript, JSON, and many other languages without extra software. These tools save time, improve readability, and help you write better code every day.
Choose any tool, paste your code, click format, and enjoy clean and clear output.