Format and minify HTML, and check a page's structure, accessibility and on-page SEO.
See the structure of an HTML page: headings, links, images, forms and tags.
Catch common accessibility mistakes in your HTML before your users do.
Check the on-page SEO basics of any page from its HTML.
Indent messy or minified HTML so it's easy to read and edit.
Make HTML smaller without changing how the page looks or works.
Every tool runs in your browser. Nothing you paste or upload is sent to our servers.