HTML Beautifier
Beautify HTML by adding consistent indentation and line breaks around nested elements and attributes.
Indent and wrap HTML markup to make nested elements and attributes easier to read.
Processing happens in this browser. Your input is not uploaded or saved.
🔒 All processing happens in your browser — files never leave your device. Your input stays in this browser and is not uploaded to Smart Online Tools.
How it works
- Paste HTML markup.
- Select Beautify HTML.
- Copy the readable result into your editor.
Good to know: Formatting does not validate browser behavior or accessibility. Review whitespace inside preformatted and inline content before replacing a source file.
Privacy and processing
All processing happens in your browser — files never leave your device. Your input stays in this browser and is not uploaded to Smart Online Tools.
When to format HTML
A readable HTML tree makes it easier to find missing closing tags, inspect nested components, and review changes in a pull request. The beautifier uses an HTML parser rather than inserting line breaks at every angle bracket.
HTML whitespace can affect visible text in some contexts, especially inside preformatted elements. Treat the output as a formatting aid and inspect sensitive layouts in a browser before replacing production markup.
Frequently asked questions
What does HTML Beautifier do?
Indent HTML markup to make document structure easier to read. Beautify HTML by adding consistent indentation and line breaks around nested elements and attributes.
Does this tool upload my files or input?
Your input stays in this browser and is not uploaded to Smart Online Tools.
What should I know before using this tool?
Formatting does not validate browser behavior or accessibility. Review whitespace inside preformatted and inline content before replacing a source file.