Clean Customer and Subscriber Emails from Squarespace
✓ TestedWorks with CSV, Excel, Google Sheets → JSON-LD Schema
By dataclean.to team · 2026-02-12
Squarespace websites collect email addresses through newsletter signup blocks, contact forms, commerce checkout, and member areas. Each collection method has different levels of built-in validation, resulting in an export that mixes well-validated commerce emails with raw form submissions containing typos and fake entries. dataclean.to processes your Squarespace export to validate every address and give you a unified clean contact list.
The Problem
Squarespace exports blend email data from distinct sources with vastly different quality levels. Commerce checkout emails are tied to real purchases and are relatively reliable, though mobile checkout still introduces typos. Newsletter block signups perform basic format checking but accept addresses at nonexistent domains. Contact form submissions go into a separate system and may not even enforce email format if the form builder was configured casually. Form block submissions allow any text in email fields unless the field is specifically set to the 'email' input type. Member area signups require email confirmation, making them the most reliable source. When exporting, Squarespace outputs separate CSVs for each data source (commerce, newsletter, forms, members), and consolidating these reveals duplicate contacts with inconsistent email formatting. Squarespace's built-in email campaigns tool sends to newsletter subscribers without pre-validation, so the first campaign reveals bounces that could have been prevented. Squarespace data export documentation
How to Fix It
1
Export email data from Squarespace
In Squarespace, export customer data from Commerce, newsletter subscribers from Marketing, and form submissions from the Forms panel. Download each as CSV separately, noting the source of each file.
2
Upload each export to dataclean.to
Import each Squarespace CSV file. The platform validates email addresses from each source, applying appropriate scrutiny: light validation for commerce emails, thorough checking for form submissions.
3
Fix form submission errors
Clean up emails from contact forms and form blocks that lacked proper input validation. Correct domain typos, remove entries where non-email text was entered in the email field, and flag disposable addresses.
4
Consolidate and deduplicate across sources
Merge commerce customers, newsletter subscribers, form contacts, and member area signups into one list. Remove duplicates where the same person appears across multiple Squarespace collection points with slight email variations.
5
Export unified clean contact list
Download a single validated contact list from all Squarespace sources. Use it for email marketing, customer communications, or migration to a dedicated CRM with confidence in address quality.
Frequently Asked Questions
Why are Squarespace form emails unreliable?
Squarespace form blocks accept any text in email fields unless the field is specifically configured as an email input type. Many site owners use a generic text field for email collection, which bypasses even basic format validation. This allows gibberish, partial addresses, and non-email text to be submitted.
Can I clean Squarespace commerce and newsletter data together?
Upload each export separately to dataclean.to for validation. Then combine the clean results to create a unified customer list. This approach lets you track which source produces the best email quality.
Does cleaning help with Squarespace Email Campaigns deliverability?
Yes. If you use Squarespace's built-in email campaign tool, removing invalid addresses before sending prevents bounces that hurt your sender reputation. Upload your newsletter subscriber export, clean it, and re-import the valid addresses.
Example: Input → Output
name
email
phone
city
status
Alice Johnson
alice@example.com
+1-555-0101
New York
active
alice johnson
ALICE@EXAMPLE.COM
5550101
new york
Active
Red rows show common data quality issues. dataclean.to normalizes and generates JSON-LD automatically.