HTML Formatter is a free, browser-based tool that lets developers instantly clean, format, and validate HTML code — no login, no file uploads to a server, no fluff.
Everything runs 100% inside your browser — your code never leaves your machine, making it safe for private, client, or proprietary markup.
• Formats & beautifies messy or minified HTML instantly
• Validates HTML structure before formatting
• Upload .html files or paste code directly
• No install, no login, completely free
