Generated HTML — from templating engines, CMS output, or automated tools — is often unindented and hard to read. This HTML beautifier reformats your markup with proper indentation and tag structure, making it easy to understand and debug. Minify mode strips whitespace and comments to reduce payload size for production. All processing is client-side.

HTML formatting is particularly useful when you're debugging server-rendered pages, inspecting email template output, or reading the source of a page you're analyzing. Paste in raw or minified HTML and get clean, indented markup where each element's nesting is immediately visible. The formatter handles void elements (<img>, <input>, <br>), inline elements, and mixed content correctly.

If you're updating Tailwind CSS class names in your HTML — especially migrating from Tailwind v3 to v4 where class names and configuration changed — use our Tailwind v3 to v4 migration tool to convert your config and understand which utilities have changed. Beautifying your HTML first makes it much easier to find and update class attributes across large templates.

Tips

HTML is whitespace-significant in some elements (<pre>, <textarea>) — the formatter preserves whitespace inside these tags.
Minified HTML for production: focus on removing comments and inter-element whitespace. Aggressive whitespace removal inside block elements can cause subtle layout shifts.
Use minify mode to compare before/after byte counts — HTML compression typically saves 5–15% on server-rendered pages.
For email templates, paste the HTML output into an email preview tool after formatting to verify rendering across clients — email HTML has very different rules from web HTML.