Anvil adds custom fields — text boxes, dropdowns, checkboxes, dates and more — to your products, so customers can personalize what they buy. Built on Shopify theme app blocks, your options keep working through theme updates and previews. Switch themes and you re-add the block once; your option sets stay saved. Apply a set of fields to one product, a collection, by tag, or your whole catalog in a single click. Every customer selection saves to the order automatically, ready for fulfillment.

• Built to last — options live in theme app blocks, so they survive theme updates.
• Add a field set to your whole catalog, collection, or by tag in one click.
• Every selection saves to the order automatically, ready for fulfillment.