Transform messy HTML into clean, readable, well-structured code. Format, minify, and validate markup with flexible options: custom indentation, max line length, whitespace preservation, self-closing void tags, and lowercase tag names.
Open HTML Formatter → free, no sign-inHTML Formatter is a free, browser-based tool on Doathingy.com. It lets you HTML formatter online directly in your browser — no software to install, no account required, and no files sent to any server.
Transform messy HTML into clean, readable, well-structured code. Format, minify, and validate markup with flexible options: custom indentation, max line length, whitespace preservation, self-closing void tags, and lowercase tag names.
Everything runs locally on your device. Open the tool, do the task, done. It is designed for people who need results quickly, without a learning curve or a subscription.
Anyone who needs to HTML formatter online without friction. No technical knowledge required — if you can use a browser, you can use this tool.
No tutorials. No learning curve. The tool is designed to be immediately obvious to anyone.
Privacy first. Your files and data never leave your device. All processing happens locally in your browser — nothing is uploaded to a server.
Completely free. No trial periods, no premium tiers, no hidden costs. Use it as often as you need.
Zero friction. No account, no download, no browser extension. Works in any modern browser on desktop or mobile.
Built for one job. HTML Formatter does exactly what it says and nothing more. No feature bloat, no distracting adverts.
What does 'Format' do?
It reformats your HTML with consistent indentation and structure, making it easier to read and maintain.
What does 'Minify' do?
It strips whitespace and unnecessary characters to produce the smallest possible HTML — useful for production.
Can I set custom indentation?
Yes — set your preferred number of spaces or tabs.
Does it validate HTML errors?
Yes — the validate function checks for common HTML errors.
Is this free?
Yes — free, no sign-in required.
Free. Instant. No sign-in. Open it now and get the job done.
Open HTML Formatter on Doathingy.com →