What is HTML Formatter?
An HTML Formatter is a free online tool that transforms messy, minified, or hard-to-read HTML code into clean, properly indented, human-readable markup. Whether your HTML was exported from a CMS, copied from a website, or written in compressed format, this tool adds consistent indentation, line breaks, and spacing.
Our formatter validates your HTML structure, highlights syntax errors, and lets you switch to minified output for production use. It supports all modern HTML5 elements and attributes.
Use it during development to keep code readable, before code review to standardize formatting, or when debugging—proper indentation makes structure and nesting obvious. The minify option produces optimized output for deployment.
How to Use HTML Formatter
- Paste or upload HTML: Paste HTML into the input editor or upload an .html/.htm file using the Upload button.
- Try Sample: Click the Sample button to load example HTML and see formatted output instantly.
- View output: The formatted HTML appears in the Output panel with validation status.
- Copy or download: Use Copy to clipboard or Download to save your formatted or minified HTML.
No signup required. Works on desktop and mobile.
Frequently Asked Questions
How do I format messy HTML code?
Paste your unformatted HTML into the input editor. The formatter automatically adds indentation, line breaks, and spacing. It also validates structure and highlights errors. Use the Sample button to try with example HTML.
Can I format and minify HTML in the same tool?
Yes! Use Format for readable HTML during development, and the Minify button for compressed HTML ideal for production. Switch between modes anytime.
Is the HTML formatter free?
Yes, completely free with no limits. No registration required. Use it for personal projects, work, or learning—no restrictions.
What file formats are supported?
Paste HTML directly or upload .html and .htm files. The tool accepts full documents, fragments, and inline HTML. Output can be copied or downloaded.