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Can Addons block products be selected by default?

No. Every add-on in the block starts unselected. Checkbox upsells on a bundle can start selected.

Updated November 4, 2026

No. Every add-on in the Addons block starts unselected, and no setting changes that. The shopper turns each one on.

Make the add-on easier to spot

  1. In Shopify admin, open Online Store → Themes.
  2. Click Customize on your theme.
  3. Open the template and select the Addons block.
  4. Under Selection controls, pick Switch, Checkbox or Radio.
  5. Raise Size and pick a Color that stands out.
  6. Click Save.

Use a bundle instead

Checkbox upsells on a bundle are a separate feature. Each one has a Selected by default option. The Bundles guide has the steps.

Ask for it

Suggest it on our Request Board. The link sits at the bottom of the Conversion Blocks page.

Also searched as: addons checked by default, pre-selected add-on, preselect addon, auto checked addon, toggled by default, default on add-on, addon auto select

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