Template builder
Two ways to get a template: from cards you already have, or from a description of what you want. Either way you get the template and the cards that use it, ready to paste. Nothing leaves your browser.
To see what a single placeholder gives back, step by step, use Try a placeholder.
From cards you already have
Paste the cards - copies of one card that differ by an entity, a name, an icon - the way the card editor or the raw configuration editor shows them. A list of cards, a whole view or a whole dashboard all work, and cards inside stacks are found too.
Describe what you want
Nothing to paste yet? Answer these and the template is written as you go.