- Hosted widget: submissions live in Common Ninja's dashboard, not Squarespace
- Free plan covers one form; paid tiers lift submission limits and unlock advanced features
- Squarespace code blocks need a Core (formerly Business) plan or higher
- Squarespace's own Newsletter Block already covers Email Campaigns, Mailchimp, Zapier and Google Drive for free
Overview
What Free Email Subscription Form Widget (Common Ninja) is
Free Email Subscription Form Widget is Common Ninja's newsletter sign-up form, a hosted widget built in their editor and embedded on a Squarespace page with one line of code. The old copy here described buttons, tabs and accordions, a different product.
What it does
The vendor page lists name and email plus custom fields such as first name, interests, company, referral source and a marketing consent checkbox, reorderable by drag and drop. New subscribers can sync to your email platform; the vendor names Mailchimp, MailerLite, Klaviyo and Zapier. Honeypot fields and optional CAPTCHA keep bots off the list, repeat submissions can be blocked, and the subscriber list exports to CSV from the Common Ninja dashboard.
Who it suits
Blogs, newsletters, launch waitlists and lead capture on Squarespace where you want segmentation fields or a direct sync to Klaviyo or MailerLite.
One honest caveat
Squarespace's own Newsletter Block is free, native and connects to Email Campaigns, Mailchimp, Zapier and Google Drive, so if you use one of those you probably do not need this. The widget earns its place for Klaviyo or MailerLite users and for consent and interest fields. Subscribers sit in Common Ninja's dashboard until synced, on a third party script.
Setup and pricing
Build the form in Common Ninja's editor and paste the embed code into a Squarespace code block (Core, formerly Business, plan or higher). Common Ninja is recurring software: the free plan covers one email subscription form with no time limit, and paid tiers add forms, submission volume, premium skins and the advanced features noted above.
Related guide
Read my roundup of the best Squarespace plugins in 2026 or browse the plugins collection.
- Name, email and custom subscriber fields including consent checkbox
- Sync to Mailchimp, MailerLite, Klaviyo and Zapier
- Honeypot and optional CAPTCHA, with repeat submission control
- Notification emails and CSV subscriber export
- Skins, custom CSS and header or footer images
Full specifications
Specifications
Sync to mailchimp, mailerlite, klaviyo and zapier
Honeypot and optional captcha, with repeat submission control
Notification emails and csv subscriber export
Skins, custom css and header or footer images
Newsletters that segment by interest at sign-up
Launch waitlists and lead capture with consent fields
Free plan covers one form; paid tiers lift submission limits and unlock advanced features
Squarespace code blocks need a core (formerly business) plan or higher
Squarespace's own newsletter block already covers email campaigns, mailchimp, zapier and google drive for free