HTML Beautifier & Minifier
Paste your HTML, pick a mode, and get either clean, indented code or a compact version for production. The HTML Beautifier & Minifier handles the CSS and JavaScript inside your markup, keeps conditional comments intact when minifying, and shows exactly how much smaller your code became. It is free, and the page states that your code never leaves your device.
What Is an HTML Beautifier & Minifier?
Two tools in one. An HTML beautifier reformats code so its structure is easy to read: consistent indentation, one nested level per step, tidy attributes. An HTML minifier does the opposite. It removes whitespace, comments and optional tags to make the file as small as it can safely be.
You normally want both versions. Work in the readable one, and ship the minified one.
How to Use the HTML Beautifier & Minifier
1. Paste your HTML into the editor.
2. Choose Beautify or Minify. You can switch between them with one click.
3. Adjust the options: indentation with spaces or tabs, attribute style, comment handling, and how inline CSS and JavaScript are treated.
4. Check the live size comparison to see the character count before and after, and the percentage reduction.
5. Copy the result.
HTML Beautifier: Make Messy Code Readable
Use the beautifier when you cannot read the markup in front of you. That usually means output from a build tool or a CMS, HTML copied from a page’s source, or code you have inherited from someone else. The tool re-indents it so each nested element sits one level deeper than its parent, and you can choose spaces or tabs and how attributes are laid out.
Readable code is easier to review, easier to debug, and much easier to compare in version control.
HTML Minifier: Compress HTML for Production
The minifier strips what a browser does not need: extra whitespace, comments and optional tags. HTML allows some tags to be left out, such as the closing </li> in a list, and a minifier can drop them. The page you serve is smaller and downloads faster, and the live comparison shows the exact saving in characters and as a percentage.
Minification is only useful if the page still works, so the tool protects the cases that most often break it:
• Conditional comments are preserved, so any code that depends on them keeps working.
• Whitespace inside pre, code and textarea is left alone, because it is part of the content.
• Inline CSS and JavaScript are handled rather than mangled, with an option to compress them further.
Working with HTML, CSS and JavaScript Together
Real HTML files are rarely just HTML. They carry style blocks and script blocks, and a formatter that ignores them leaves the messiest parts untouched. This tool handles inline CSS and JavaScript in both modes. When you beautify, the embedded code is formatted along with the markup. When you minify, you can choose to compress the embedded CSS and JavaScript further as well.
For stand-alone stylesheets and scripts, use the CSS Beautifier & Minifier and the JavaScript Beautifier & Minifier on OnlineToolPot.
When to Beautify and When to Minify
| Situation | Mode | Why |
| Writing or editing code | Beautify | Readable structure is easier to change and review. |
| Debugging someone else’s markup | Beautify | Indentation shows how elements are nested. |
| Comparing changes in version control | Beautify | Consistent formatting keeps diffs small. |
| Deploying to production | Minify | Smaller files download faster. |
Common Mistakes to Avoid
❌ Mistakes to Avoid
✓ Solution:
Minifying code you are still editing. Minified HTML is close to unreadable. Keep your working source readable, beautify it during development, and minify a copy when you deploy.
Breaking conditional comments. Some comments carry instructions, not notes. A minifier that strips every comment breaks them. This tool preserves conditional comments.
Deploying without testing. Minified output should render the same as the original, but confirm it. Check the minified page on a staging site before it goes live.
Losing whitespace in pre, code and textarea. Spacing inside these tags is content. Removing it changes what the reader sees. The tool leaves it alone, but check any page that relies on it.
Letting formatting drift across a team. If one person indents with tabs and another with two spaces, every shared file produces noisy diffs. Agree on one style, apply it with the beautifier, and automate the check if your workflow allows it.
Frequently Asked Questions
A beautifier adds indentation and line breaks so the code is easy to read. A minifier removes whitespace, comments and optional tags so the file is as small as possible. Use the beautifier while you work and the minifier before you deploy.
It depends on how much whitespace, how many comments and how much inline code your file contains. The tool shows the exact character count and percentage reduction for your own markup.
Done carefully, it should not. The tool preserves conditional comments and the whitespace inside pre, code and textarea, which are the usual causes of problems. Even so, test the minified page before you publish it.
Yes. Style and script blocks inside your HTML are handled in both modes, and minifying can compress them further if you choose.
No. Minification rewrites the file itself so it contains fewer characters. GZIP or Brotli compresses the file as your server sends it. They work at different stages, so you can use both.
No. It does not create pages or sites. It formats or compresses HTML you already have.
The page states that the tool runs in your browser and your code never leaves your device.
Yes. It is free to use, with no signup.
Format or Compress Your HTML
Paste your markup, choose a mode, and copy the result. Test minified pages before you publish them.
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