Email Compatibility Fixer: catch Gmail clipping before send

A polished HTML email can still be clipped by Gmail or render differently in Outlook and dark mode. HtmlDrag Email Compatibility Fixer adds a browser-local preflight step: upload or paste HTML, detect Gmail 102KB clipping risk, missing ALT text, incomplete font fallbacks, dark-mode contrast, Outlook issues, and accessibility gaps.

Users review a selectable list instead of accepting a blind rewrite. They can apply the fixes they want, preview the repaired email, download the HTML, or continue with visual editing for copy and brand adjustments. The compatibility analysis and repair step runs locally in the browser.