Looping over lists and line items

One trigger can carry a whole list. An order holds several products; a form answer holds several tags. Zapier calls such lists line items. A normal action receives the whole list at once (often joined with commas). When you need one action per item, such as one CRM product line per ordered product, use a loop.

A loop means "repeat these steps for each item". Looping by Zapier creates loops from:

• Text: split a value such as red, green, blue by a separator (a comma by default).
• Line items: one iteration per item in a list field. You can include several line-item fields together, such as product name and quantity.
• Numbers: a start and end value, for example 1 to 10.

Every step after the Looping step runs once per item. Things to know:

• Iterations run in parallel, not one after another, and each appears as its own run in Zap history.
• Steps after the loop use one task per iteration, so a 200-item loop with two steps uses 400 tasks. Put one-time steps before the loop.
• To run a step only once at the end, add a filter that passes only when the loop_iteration_is_last field is true.
• One Looping step per Zap, no loops inside loops, and a cap on iterations (500 by default).
• A test creates only the first iteration; a live run creates all of them.

Formatter's line-item tools help prepare lists before looping, for example turning text into line items.