HTML Preview
Preview an HTML fragment in an isolated browser frame.
Website & buildingFREE TOOL
HTML Formatter
Format HTML with consistent indentation and readable structure.
Runs in your browser
Your input
Your input stays in your browser. No account needed.
Your result
↗A little input.
A little input.
A useful result.
Fill in the details and run the tool.
Your result will appear here.
No registrationProcessed locallyFree to use
How to use HTML Formatter
Paste a document or fragment. Formatting preserves the markup, but invalid HTML may need correction.
- Paste your text or load the example.
- Check your input and run the tool.
- Review, copy or download the result.
Example input
<div><h1>Hello</h1><p>Build something great.</p></div>
Frequently asked questions
How do I use HTML Formatter?
Paste a document or fragment. Formatting preserves the markup, but invalid HTML may need correction.
Is HTML Formatter free to use?
HTML Formatter is free and does not require an account. Copy or download the result for your workflow.
What happens to my input?
Inputs and files are processed on your device. Anonymous usage events never contain your input or generated output.