HTML Dark Mode Email

Hey everyone,

I'm an email/content dev and got tired of manually checking for dark mode compatibility issues across different clients (Apple Mail vs Gmail vs Outlook all handle it differently).

So I built a free validator that scans your HTML and flags specific issues with line numbers + suggested fixes.

It catches things like:

- Missing dark mode meta tags

- Light backgrounds that'll break in dark mode

- Gmail clipping risk (>102KB)

- Missing alt text on images

- Base64 embedded images

You just paste your HTML and it tells you what's broken and how to fix it.

https://rdv-dark-mode-validator.vercel.app/

Still early/rough around the edges, but it's been helpful for my workflow. Would genuinely appreciate any feedback from folks who build HTML emails regularly - what am I missing? What would make this more useful?

Free to use, no signup required.