Best way to get custom-designed HTML emails into Klaviyo in 2026?
I build my email flows as fully custom HTML (AI design tools spit out complete HTML now and it has gotten scary good). Right now I paste the HTML into Klaviyo's HTML editor (Content > Templates > Create > HTML editor) and it works, but I feel like there might be a cleaner, faster workflow I am missing.
For anyone running custom HTML in Klaviyo:
Is pasting into the HTML editor still the best method, or is there a more efficient pipeline you use?
How do you handle edits later without the template breaking?
Any must-do checks so it renders well across all clients (Outlook, Gmail dark mode, iOS)
Do you use hybrid templates with data-klaviyo-region so you can still drag and drop blocks, or keep it pure HTML?
Trying to move fast without sacrificing render quality across devices. What is your actual setup? Appreciate any tips.