How to use HTML Formatter Online
- Start by adding the HTML you want to format into HTML Formatter Online.
- Use the Indent setting to control the result.
- Watch the output update instantly while you adjust the HTML.
- When it looks right, Copy to save it.
About this tool
Everything HTML Formatter Online does happens on your own device. HTML Formatter Online works on HTML in your browser, transforming or previewing the markup you paste locally.
Generated previews are escaped or sandboxed so pasted markup cannot affect the tool. Nothing you enter is uploaded, and it keeps working offline once the page has loaded.
Frequently asked questions
How do I use HTML Formatter Online?
HTML Formatter Online runs entirely on your device: add your input using the Indent control, and it formats it locally in real time.
Is HTML Formatter Online free to use?
Yes — HTML Formatter Online is completely free, with no usage limits.
Does HTML Formatter Online upload my data?
No — HTML Formatter Online processes everything locally in your browser, so nothing you enter is uploaded or stored.
Will HTML Formatter Online change my HTML structure?
HTML Formatter Online only reformats or analyzes what you paste; the underlying structure of your HTML is preserved.
Does HTML Formatter Online work offline?
Once the page has loaded, HTML Formatter Online keeps working with no network connection.