Renaming a tag across the catalog is one task with two editors: add the new one, remove the old one.
You will be redirected to the Shopify app store.
Tags are a product-level field, so a tag task selects products rather than variants. Because automated collections and Flow workflows read tags, this is one of the edits with the widest downstream effect.

Follow the steps in your own store — the free plan covers ten products per task.
You will be redirected to the Shopify app store.
Shopify treats “Winter Boots”, “winter boots” and “winter boots” as three different tags. Type carefully, because a stray space creates a tag nothing is filtering on.
The task stores the tag set before the change, so a revert restores removed tags as well as clearing added ones.
Add, remove and rename product tags across a filtered part of the catalog.
Read moreConditions, match all or any, exclusions and the preview that prevents accidents.
Read moreNine filters that show exactly where your catalog data has drifted.
Read more