Custom data send to klaviyo in shopify sign up form

Shopify Discussion
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Topic summary

Main topic: sending custom customer data from a Shopify sign-up form into Klaviyo.

Latest guidance: one reply advises creating matching custom fields in both Shopify and Klaviyo. In Shopify: navigate to Settings > Customization > Custom fields, then add and name fields aligned to the data you want to capture.

Key concept: “custom fields” are additional data attributes beyond the default fields, used to store extra information on a customer profile.

Action items suggested:

  • Create the required custom fields in Shopify.
  • Create corresponding fields in Klaviyo to receive the data.

Status: no confirmed implementation steps for mapping the sign-up form inputs to Klaviyo are provided, and no verification that data flow works yet. The helper offered further assistance, so the thread remains open/ongoing with details on Klaviyo-side configuration still unspecified.

Summarized with AI on January 18. AI used: gpt-5.
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Hi, In my store we want to send customers custom data in Klaviyo through the Shopify sign-up form. Please suggest to me how can I do that.
Thanks in advance.

1 Like
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I’m happy to help you figure this out! In order to send custom data to Klaviyo, you will need to create custom fields in both Shopify and Klaviyo. In Shopify, you can create custom fields by going to the “Settings” page and selecting “Custom fields” under the “Customization” section. On the Custom fields page, you can add a new custom field and name it whatever you like. I recommend naming it something that makes sense for the type of data you’re trying to capture.

Let me know if you get it or i can help?