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Contents

Introduction

SKU Generator for WooCommerce plugin adds full SKU support to WooCommerce.

SKU Format Options

This section lets you set format for SKUs.

Number generation
Possible values: from product ID, sequential or pseudorandom.
Default: From product ID
Sequential number generation counter
Ignored if “Number Generation” is not “Sequential”.
Default: 1
Prefix
Default: None
Minimum number length
Default: 0
Suffix
Default: None
Variable products variations
Possible values: SKU same as parent’s product, generate different SKU for each variation or SKU same as parent’s product + variation suffix.
Default: SKU same as parent's product
The variation suffix can use letters, numbers, or product attributes. If numbers, an additional option for minimum number length will appear.
Variable Products Variations field has three options:
  1. SKU exactly the same as parent product’s.
  2. SKU is different for each variation: for example, parent SKU – 0001, variations – 0002, 0003, 0004 etc.
  3. SKU same as parent product’s + variation suffix: for example parent SKU – 0001, variations – 0001a, 0001b, 0001c etc.
Template
Replaced values: {category_prefix}, {category_suffix}, {category_slug}, {category_name}, {tag_prefix}, {tag_suffix}, {tag_slug}, {tag_name}, {prefix}, {suffix}, {variation_suffix}, {sku_number}. Please note that in order to use any of {category_...} or {tag_...}replaced values, corresponding section must be enabled.
Default: 
{category_prefix}{tag_prefix}{prefix}{sku_number}{suffix}{tag_suffix}{category_suffix}{variation_suffix}
If you want to force a part of the SKU to be uppercase, simply enter the template value in all uppercase, example: {VARIATION_SUFFIX}.

More Options

Automatically generate SKU for new products
If enabled – all new products will automatically get SKU according to set format values. To change SKUs of existing products, use Regenerator tool.
Default: yes
Delay SKU generation till product is published
Check this if you are using category/tag prefix/suffix for products SKU or individual SKUs for variations.
Default: yes
Generate SKUs only for products with empty SKU
Default: no
Allow duplicate SKUs
Default: no
Search by SKU
Add product searching by SKU on frontend.
Default: no
Search by SKU: Algorithm
Change this if you are experiencing issues with search by SKU on frontend. Possible values: posts_search; pre_get_posts.
Default: posts_search
Add SKU to customer emails
Default: no

Categories Options

These settings control how the category-related variables function in your template (i.e. {category_prefix}, {category_suffix}, {category_slug}, and {category_name}).

Enable/Disable
Default: no
Sequential numbering on per category basis
Default: no
Use Yoast primary categories
Yoast SEO adds the ability to mark a category as “primary”. Normally when a product has multiple categories we use only the first one. With this option enabled, we will instead use the one identified by Yoast as “primary”, if set.
Default: no
Category X Prefix
Default: None
Category X Suffix
Default: None
Category X Counter
Default: 1

Tags Options

These settings control how the tag-related variables function in your template (i.e. {tag_prefix}, {tag_suffix}, {tag_slug}, and {tag_name}).

Enable/Disable
Default: no
Tag X Prefix
Default: None
Tag X Suffix
Default: None

SKU Regenerator Tool

The SKU Regenerator Tool regenerates SKUs on all products at once, according to your settings.

Variable Products

When dealing with Variable Products, whenever you add or edit variations use the “Generate SKUs for Variations” bulk action to generate the SKUs. This will generate the SKUs for all variations on the current product:

Variations SKUs will not be generated until you do this. (Or until you run the SKU Regenerator Tool, which generates SKUs for ALL products and variations at once.)

Tips & Tricks

To style SKU on frontend, try adding some custom CSS (e.g. to “Appearance > Customize > Additional CSS”): 
div.product_meta span { display: block !important; }
div.product_meta span.sku_wrapper { color: green !important; }
div.product_meta span.sku { color: red !important; }
For developers – to get SKU by product ID in PHP: 
if ( ! function_exists( 'get_product_sku_by_id' ) ) {
    /**
     * Gets product SKU by product ID in WooCommerce.
     */
    function get_product_sku_by_id( $product_id ) {
        $product = wc_get_product( $product_id );
        return $product->get_sku();
    }
}