HTML Formatter
Format and beautify HTML instantly online. Indents nested elements, places block tags on their own lines, and keeps inline elements compact. Free HTML beautifier — runs entirely in your browser.
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HTML minification removes whitespace between tags, strips comments, and collapses redundant attributes to reduce file size. The result is a single-line or near-single-line HTML file that loads faster but is completely unreadable for development and debugging. An HTML formatter reverses this: it parses the markup using the browser's own HTML parser (via DOMParser) and re-serializes the resulting DOM with consistent 2-space indentation, placing each block-level element on its own line.
Formatted HTML is needed when debugging production pages, reading HTML exported from CMS systems or HTML email builders, understanding the structure of server-rendered pages, or reviewing HTML snapshots in testing tools. Minified HTML from a CMS or build tool often contains all content on a single line, making it impossible to navigate visually or to diff meaningfully in version control.
This tool uses the browser's built-in DOMParser to parse the HTML, which means it handles malformed or incomplete HTML gracefully — unclosed tags are automatically closed, misplaced elements are corrected, and optional tags are normalized. The output reflects how the browser actually interprets the markup, which may differ from the raw source in cases where the HTML had errors.
Common Use Cases
Reading HTML snapshots from end-to-end test frameworks
Cypress, Playwright, and Selenium can capture HTML snapshots of pages at various points in a test run. These snapshots are often minified or have inconsistent formatting. Pasting a snapshot into the formatter makes the DOM structure readable, helping developers understand exactly what the page state looks like at the point of a test failure.
Decoding HTML emails from ESPs
Email service providers (Mailchimp, SendGrid, HubSpot) generate HTML email templates with heavily optimized, minified markup to maximize deliverability and rendering consistency across clients. When debugging an email that renders incorrectly in a specific client, formatting the HTML reveals the table-based layout structure and inline styles that control rendering.
Understanding CMS or page builder output
WordPress page builders (Elementor, Divi, Beaver Builder) and headless CMS outputs often produce deeply nested, compact HTML with dozens of wrapper divs. Formatting the HTML exposes the actual element hierarchy, making it easier to write targeted CSS selectors or to migrate the content to a cleaner markup structure.
Reviewing server-rendered HTML from web scraping
Web scrapers using Puppeteer, Playwright, or BeautifulSoup capture the full rendered HTML of pages, which is typically minified or inconsistently spaced. Formatting the captured HTML makes it possible to visually inspect the structure, identify the selectors needed for data extraction, and verify that JavaScript-rendered content was captured correctly.
How to Use
- Paste minified or unformatted HTML in the left panel.
- The formatted HTML with proper indentation appears instantly.
- Block elements are placed on their own lines; inline elements stay on the same line.
- Click "Copy Output" or "Download" to save the formatted result.