.html — HyperText Markup Language
The standard markup language for web pages, describing structure and content that browsers render visually.
Also known as: .htm, .xhtml
HTML files can include JavaScript and load external resources. Opening one locally runs any embedded scripts in your browser, so only open HTML files from sources you trust.
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Frequently asked questions
What is a .html file?
The standard markup language for web pages, describing structure and content that browsers render visually.
Can I edit a .html file?
Yes — .html files are commonly editable with software such as Any web browser.
Does having a .html extension mean the file is safe?
No single extension can guarantee that. HTML files can include JavaScript and load external resources. Opening one locally runs any embedded scripts in your browser, so only open HTML files from sources you trust. Always consider where the file came from, not just its name.