Harbor Checkout Fields for WooCommerce lets you add custom fields to WooCommerce’s block-based checkout without writing code.

Fields are collected at checkout, saved to order metadata using WooCommerce’s HPOS-safe order API, and automatically appear in the admin order detail screen and in customer confirmation emails.

Real-world use cases

Gift message – let customers include a message for the recipient
Delivery instructions – collect access codes, gate instructions, or preferred drop-off spots
B2B purchase order number – required for invoice reconciliation
How did you hear about us? – a select dropdown for attribution tracking
Age confirmation checkbox – required for alcohol, tobacco, or age-gated products
Special requests or dietary notes – for food, events, or personalised items

Free Features

Add text, email, phone, checkbox, and select (dropdown) fields to the block checkout
Choose field location: Contact section, Address block, or Order section
Mark fields as required or optional
Add a placeholder prompt to select fields
Drag-to-reorder fields in the admin settings page
Field values saved to order metadata (HPOS-compatible)
Values displayed in the admin order detail view (after billing address)
Values displayed in customer and admin order confirmation emails
No coding required – works out of the box

How it works

Fields are registered with WooCommerce’s official block checkout additional-fields API (available in WooCommerce 8.9 and later). Values are stored on the order with the HPOS-safe order API and read back with $order->get_meta(), so no direct database queries are made against order tables.

Requirements

WordPress 6.4 or later
WooCommerce 8.9 or later (block checkout additional fields API)
PHP 8.2 or later
WooCommerce block checkout (not the legacy shortcode checkout)
HPOS (High Performance Order Storage) compatible

Support

For help with the plugin, post in the WordPress.org support forum or email [email protected].