How to Beautify HTML, CSS, and JavaScript
Format and beautify minified or messy HTML, CSS, and JavaScript code with proper indentation and structure.. This step-by-step guide walks you through the process using LevnTools Code Beautifier, a free browser-based tool that handles everything locally on your device. No software to install, no account to create, and no files uploaded to external servers. Follow these steps to complete the task in under a minute — updated for 2026.
Select the language
Choose the code language: HTML, CSS, or JavaScript. The tool uses language-specific formatting rules including proper tag nesting for HTML, property grouping for CSS, and statement formatting for JS.
Paste your code
Paste the minified or poorly formatted code into the input area. The tool handles any valid code regardless of how compressed or messy it is.
Configure formatting options
Set the indentation (2 spaces, 4 spaces, or tabs), line length limit, and whether to preserve empty lines. These options let you match your project coding standards.
Beautify and copy
Click Beautify to format the code. The output has proper indentation, line breaks, and spacing. Copy it back into your project or editor.
Pro Tips
- Use this tool to make minified production code readable when debugging third-party scripts.
- Set formatting options to match your project .editorconfig or Prettier configuration for consistency.
- Beautifying code does not change its functionality — the minified and beautified versions work identically.
Common Issues & Fixes
Issue: The beautified code has syntax errors.
Fix: The original code likely had syntax errors that become visible when formatted. The tool formats valid code; fix syntax errors separately.
Issue: The formatting does not match my project style.
Fix: Adjust the indentation, bracket style, and other formatting options to match your project conventions.
Step-by-Step: How to Beautify HTML, CSS, and JavaScript
Complete this task using LevnTools Code Beautifier by following each step below. Every step runs in your browser with zero server interaction.
Step 1: Select the language
Choose the code language: HTML, CSS, or JavaScript. The tool uses language-specific formatting rules including proper tag nesting for HTML, property grouping for CSS, and statement formatting for JS. Code Beautifier handles this step entirely in your browser, so your developer files remain private throughout. After completing this step, proceed to the next one to continue processing.
Step 2: Paste your code
Paste the minified or poorly formatted code into the input area. The tool handles any valid code regardless of how compressed or messy it is. Code Beautifier handles this step entirely in your browser, so your developer files remain private throughout. After completing this step, proceed to the next one to continue processing.
Step 3: Configure formatting options
Set the indentation (2 spaces, 4 spaces, or tabs), line length limit, and whether to preserve empty lines. These options let you match your project coding standards. Code Beautifier handles this step entirely in your browser, so your developer files remain private throughout. After completing this step, proceed to the next one to continue processing.
Step 4: Beautify and copy
Click Beautify to format the code. The output has proper indentation, line breaks, and spacing. Copy it back into your project or editor. Code Beautifier handles this step entirely in your browser, so your developer files remain private throughout. Once this step completes, your result is ready to download and use immediately.
Tips for Better Results with Code Beautifier
Getting the best output from Code Beautifier comes down to a few practical tips. Use this tool to make minified production code readable when debugging third-party scripts.. Set formatting options to match your project .editorconfig or Prettier configuration for consistency.. Beautifying code does not change its functionality — the minified and beautified versions work identically.. Following these recommendations ensures consistent, high-quality results every time you use Code Beautifier.
Common Issues and Fixes
If you run into problems while using Code Beautifier, these are the most common issues and their solutions. Issue: The beautified code has syntax errors.. Fix: The original code likely had syntax errors that become visible when formatted. The tool formats valid code; fix syntax errors separately.. Issue: The formatting does not match my project style.. Fix: Adjust the indentation, bracket style, and other formatting options to match your project conventions.. If none of these solutions resolve your problem, try clearing your browser cache and reloading Code Beautifier.
Frequently Asked Questions
Open LevnTools Code Beautifier in your browser and follow the 4-step process outlined in this guide. Start by select the language, then the entire process takes under a minute. No account or download is required.
LevnTools Code Beautifier is the best free option for this task because it runs entirely in your browser with no file uploads, no account requirements, and no usage limits. For users who value privacy and cost, it is the top choice in 2026.
Yes, LevnTools Code Beautifier works on mobile browsers including Chrome for Android, Safari for iOS, and Firefox Mobile. The interface adapts to smaller screens, and all processing happens locally on your device regardless of whether you use a phone, tablet, or desktop computer.
No, LevnTools Code Beautifier runs entirely in your web browser. There is nothing to install, no plugins required, and no desktop application to download. Open the tool page, follow the steps in this guide, and download your result. It works on any modern browser across all operating systems.
Yes, using LevnTools Code Beautifier to beautify html, css, and javascript is completely free. There are no premium features locked behind a paywall, no per-file charges, and no daily usage limits. The tool is and will remain free because all processing happens client-side, eliminating server costs.