Newsletter Signup Form — Free HTML Form with Mailchimp Sync

A newsletter signup form is a single email field that posts straight to a backend instead of your own server code. This one posts to splitforms at POST https://splitforms.com/api/submit with your access_key in a hidden field, so every new subscriber is stored in your dashboard and emailed to you — and, on Starter and above, forwarded to Mailchimp, ConvertKit, or any ESP that accepts webhook data. Free covers 500 signups a month with unlimited forms and email notifications included.

Newsletter Signup Form Code

Paste this into your footer, popup, or inline block. It posts directly to splitforms — no server, no PHP, no API route to write.

<form action="https://splitforms.com/api/submit" method="POST">
  <input type="hidden" name="access_key" value="YOUR_ACCESS_KEY">
  <input type="hidden" name="subject" value="New newsletter signup">
  <input type="hidden" name="form_loaded_at" id="form_loaded_at">

  <input type="email" name="email" placeholder="you@example.com" required>
  <input type="text" name="first_name" placeholder="First name (optional)">

  <!-- Honeypot — leave empty, bots fill every field -->
  <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off">

  <button type="submit">Subscribe →</button>
</form>
<script>
  document.getElementById('form_loaded_at').value = Date.now();
</script>

subject, redirect, and replyto are optional control fields splitforms reads automatically — set redirect to a thank-you page URL to send subscribers there after signup. Building this in React or Next.js instead? The same endpoint accepts a JSON fetch() POST — see the docs for the request format. Newsletter on a WordPress blog? Use the WordPress form guide or the splitforms plugin instead of pasting raw HTML.

How to Add a Newsletter Signup Form to Your Website

1. Get a free access key. Sign in to splitforms and create a form to get an access_key. The Free plan covers 500 signups a month with no credit card and unlimited forms.
2. Add the email field. Paste the form code below into your footer, a popup, or an inline block, and swap in your access_key. Email is the only required field — first name is optional.
3. Add the spam traps. Keep the hidden botcheck honeypot empty and the form_loaded_at time-trap set to the page-load timestamp — both are checked server-side before a signup is stored.
4. Test a submission. Submit a test signup from the live page and confirm it lands in your dashboard and inbox — owner email notifications are included free on every plan.
5. Connect Mailchimp or your ESP. Turn on the native Mailchimp integration, or forward each signup to ConvertKit, Brevo, ActiveCampaign, or any ESP that accepts webhook data — both are available from the Starter plan ($1/month).
6. Redirect subscribers after they sign up. Add a hidden redirect field pointing at a thank-you page, or leave it out — the signup is already stored and routed either way.

What to Ask on a Newsletter Signup Form

Keep the required list short — every extra required field costs signups. A minimal, high-converting newsletter form asks for:

• Email — required, the only field you truly need.
• First name — optional; lets you personalize the welcome email once it reaches your ESP.
• Interest or segment — an optional dropdown, useful if you run more than one newsletter or topic list.
• Consent checkbox — optional; for EU, UK, or Canadian visitors, add a plain checkbox field (e.g. "I want to receive emails from you"). It's stored with the submission like any other field, so you have a record of consent.

Send New Subscribers to Mailchimp, ConvertKit, or Any ESP

Mailchimp has a native, one-click integration in the splitforms dashboard, available from the Starter plan ($1/month) — connect it once and every new signup is added to your audience automatically, no webhook to configure. ConvertKit, Brevo, ActiveCampaign, and any other ESP that accepts webhook data can receive signups too: point a signed webhook at your ESP and every submission forwards as JSON. See the ConvertKit, Brevo, and ActiveCampaign guides for the exact webhook setup, or read the general webhooks page. Every signup is also available over the REST API (GET /api/submissionswith a bearer token) if you'd rather pull subscribers into your own tool, or hand the token to an AI agent through the free MCP server.

FAQ

Questions? Email hello@splitforms.com. See full pricing for Starter, Pro, and the 3-Year plan.