About the HTML/CSS/JS Beautifier
HTML/CSS/JS Beautifier is a free browser-based developer tool from Convertify. Clean up minified or messy HTML, CSS or JavaScript with proper indentation and line breaks, instantly. Everything runs instantly with no file upload, no account, and no usage limit.
Frequently Asked Questions
Does beautifying change how my code behaves?
No — only whitespace, indentation and line breaks are added. The logic, variable names and structure of your HTML, CSS or JavaScript stay exactly the same.
Can it beautify a full HTML page including embedded <style> and <script> tags?
The HTML mode formats the page structure itself; for best results on embedded CSS or JS blocks, format those separately by pasting just that block into the CSS or JavaScript mode.
Will this fix broken or invalid code?
No — it reformats valid syntax. Code with actual syntax errors may format unpredictably or fail, since the beautifier still has to be able to parse it first.
Is my code sent to a server?
Yes, briefly — beautifying runs through a real formatting library (js-beautify) on our server, since that's the engine that does the actual work. Your code is processed for that one request only and never logged or stored.
Related Tools
More From the Blog
How to Unlock Static Layout Layers for Easy Paragraph Editing
Tired of broken layouts and messy copy-pasting workarounds? Read how to run high-fidelity PDF to Word text extractions safely inside your local web browser.
How to Fix Unsupported JFIF Format Errors and Image Blocks
Getting unexpected file format errors when downloading images from your browser? Read how to convert JFIF to PNG safely to restore system compatibility.
How to Correct Scrambled Multi-Page Sequences and Layout Flows
Misplaced appendices or upside-down pages ruining your proposals? Learn how to reorder PDF pages visually without needing heavy software installations.
How to Fit Endless Spreadsheet Grids onto Clean Printed Pages
Tired of endless spreadsheet grids spilling across separate pages and cutting off your columns? Learn how to convert Excel to PDF cleanly to fit your layouts.
How to Fix Data Exposure Risks via Selective Page Extraction
Sharing massive multi-page documents can accidentally leak secure data. Read how to utilize split PDF pages safely to distribute targeted information sections.
How to Lock Document Layout Lines and Prevent Font Shifts
Worried that your business proposals will shift or look messy on a client's device? Read how to utilize Word to PDF workflows to lock formatting securely.
How to Unlock Tabular Financial Records and Balanced Grids
Manually retyping rows of financial ledger metrics wastes hours and risks typos. Learn how to parse data tables cleanly using a private PDF to Excel engine.
How to Fix Document Fragmentation and Combine Scattered Files
Struggling to manage scattered team reports? Learn how a secure, client-side merge PDF files pipeline organizes your data without risking server data leaks.
How to Improve Website Speed with Image Optimization
Large legacy images slowing down your website? Read our guide on how to safely convert JPG to WebP locally to optimize your page load speeds.