What are custom fields in Shopify?

They're metafields — extra data fields you attach to products, customers, orders, and pages beyond Shopify's defaults.

Do I need an app to use custom fields?

No — Shopify supports metafields natively; apps like Metafields Guru add a richer editor.

Can my theme display custom fields?

Yes — themes read metafields in Liquid; many modern themes support them out of the box.

What's a metafield namespace?

A grouping that keeps related metafields organized, e.g. 'specs' for dimensions and materials.

Can headless storefronts use custom fields?

Yes — the Storefront API exposes metafields for custom and headless builds.

Glossary Term

C

Custom Fields

Extra data fields you attach to products, orders, or customers to store information Shopify's default fields don't cover.

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Key Takeaways
Custom Fields (metafields) attach extra data to products, variants, customers, orders, and pages.
Use them for specs, care instructions, ingredients, ratings, and any attribute beyond Shopify's defaults.
Editable natively in the admin and via the API; apps like Metafields Guru add a richer editor.
Themes read metafields in Liquid; headless storefronts pull them via the Storefront API.
They let complex catalogs live in Shopify without custom apps.

Overview

Custom Fields (metafields in Shopify) let you attach extra data to products, variants, collections, customers, orders, and pages — information beyond Shopify's built-in fields. Use them for specs (materials, dimensions), care instructions, ratings, downloadable docs, or any custom attribute your theme or apps need to display.

Shopify exposes metafields natively in the admin and via the Admin API; apps like Metafields Guru and Accentuate Custom Fields add editing UI. Your theme can read metafields in Liquid to display them on product pages, and custom storefronts pull them through the Storefront API.

Custom fields are how Shopify stores handle complex catalogs without custom apps. A furniture brand stores dimensions and assembly specs; a food brand stores ingredients and allergens; a fashion brand stores fabric and care. They turn Shopify from a generic storefront into a structured catalog that matches your product data.

1

Why Custom Fields Matter for Shopify Merchants

1
Richer Product Data
Store specs, materials, care, and attributes Shopify's default fields don't cover.
2
Display Without Code
Themes read metafields in Liquid so custom data shows on product pages natively.
3
Headless Ready
Custom and headless storefronts pull metafields through the Storefront API.
4
App-Free Catalogs
Handle complex product data without building a custom app for every attribute.
5
Structured for Search
Well-named metafields can feed structured data and rich snippets for SEO.

2

Using Custom Fields Without Creating Chaos

1
Plan your namespace
Group related metafields under a namespace (e.g. specs, care) so they stay organized.
2
Use typed fields
Define metafields as text, integer, decimal, boolean, or JSON so data stays consistent.
3
Edit in bulk
Use Metafields Guru or a CSV to set metafields across many products at once.
4
Expose in your theme
Add Liquid to render metafields on product pages, or use a theme that supports them.
5
Don't duplicate variants
Use metafields for attributes that don't need their own inventory, not as a variant substitute.