HTML
Format, minify and preview HTML
HTML Formatter & Beautifier: Format, Minify & Preview HTML Online
Messy, minified, or inconsistently indented HTML is cleaned up by this formatter so it can be read and edited properly. Whether output from a CMS is being inspected, email templates are being debugged, or code-generated markup is being cleaned, it can be pasted in and well-structured, indented output is produced with one click. The live preview renders your HTML so the exact appearance in a browser can be seen.
Format vs. Minify — which is needed?
Formatting adds indentation and newlines so HTML is human-readable — great for development and debugging. Minifying does the opposite: all unnecessary whitespace is stripped to reduce file size for production. Most workflows use both — formatted while developing, minified before deploying.
Live preview
The preview tab renders your HTML in a sandboxed iframe so exactly how it looks in a browser can be seen. This is useful for checking email templates, landing page snippets, or any HTML where visual output matters. All previews are sanitized to prevent script execution.