NEWSLETTER SIGNUP · ELEVENTY

Newsletter Signup for Eleventy

Email-only newsletter capture — perfect for footers and landing pages. Free for 500 submissions per month — no backend, no SDK, no plugin.

Get free access key Copy the code

500/mo free·no card·drop-in for Eleventy

form.htmlhtml12 lines

01<form action="https://splitforms.com/api/submit" method="POST">
02  <input type="hidden" name="access_key" value="YOUR_ACCESS_KEY">
03  <input type="hidden" name="subject" value="New newsletter subscriber">
04 
05  <label for="email">Your email *</label>
06  <input id="email" type="email" name="email" placeholder="you@example.com" required>
07 
08  <!-- honeypot — bots fill every field -->
09  <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off">
10 
11  <button type="submit">Send</button>
12</form>

500

submissions / mo, free

fields, ready to ship

code outputs

60s

from copy to inbox

§ 00Eleventy + Newsletter Signupplatform-specific integration guide

Why Eleventy developers choose splitforms for newsletter signup

Eleventy (11ty) is a flexible static site generator that lets you use any templating language, but it doesn't process form submissions — the output is static HTML. Adding a Node server or a Netlify function just for a contact form defeats the simplicity that makes Eleventy appealing. The newsletter signup on this page posts from the browser to splitforms, so your Eleventy site stays static. It works with Nunjucks, Handlebars, Liquid, Markdown, and every Eleventy template language because the form is plain HTML.

§ 00Quick answerHTML · marketing

Yes — this is the shortest safe path for Eleventy.

Use the HTML snippet on this page, keep the newsletter signup fields visible in your Eleventy UI, and let splitforms handle delivery, spam filtering, storage, and webhooks.

best implementation

Paste the HTML version, then replace YOUR_ACCESS_KEY.

The posted payload contains your email. Required fields are your email.

native eleventy reality

Eleventy is a Node-based static site generator — it produces HTML at build time and ships nothing else.

use case fit

Email lists still convert 5-10x social. The newsletter signup form is the single most leveraged piece of your site — pop it up smartly, not annoyingly, and it pays compound interest.

§ 01Newsletter Signup × Eleventywhy this combination, in 80 words

Built for Eleventy developers who hate operating a backend.

Splitforms is the form backend for Eleventy sites. One POST endpoint, no SDK, no plugin — drop the newsletter signup into a page and ship.

Splitforms is the form backend for Eleventy sites. One POST endpoint, spam filtering, and a real dashboard — drop-in, no server, no PHP. Free for 500 dashboard submissions per month; Starter adds email, signed webhooks, exports, and retained uploads; Pro is $5/mo for 5,000.

✦ what you get on the free plan

✓500 form submissions per month
✓2 forms on Free; unlimited forms on Pro
✓Spam protection (honeypot + classifier)
✓Webhooks: Slack, Discord, WhatsApp, custom
✓CSV export of all submissions
✓Email notifications (CC and BCC on Pro)

§ 02Copy-paste codeHTML · 12 lines

Drop into any Eleventy project.

Replace YOUR_ACCESS_KEY with your splitforms key, paste into a Eleventy page, and ship. No build-time integration required.

form.htmlhtml12 lines

01<form action="https://splitforms.com/api/submit" method="POST">
02  <input type="hidden" name="access_key" value="YOUR_ACCESS_KEY">
03  <input type="hidden" name="subject" value="New newsletter subscriber">
04 
05  <label for="email">Your email *</label>
06  <input id="email" type="email" name="email" placeholder="you@example.com" required>
07 
08  <!-- honeypot — bots fill every field -->
09  <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off">
10 
11  <button type="submit">Send</button>
12</form>

§ 03Setup3 steps · 60 seconds · zero config

Generate, embed, receive.

Three actions stand between you and your first newsletter signup submission. None of them require a backend, a database, or a CAPTCHA library.

STEP 01GENERATE

Generate a free splitforms key

Create your form

key=sk_live_••••••••

STEP 02EMBED

Paste the newsletter signup into your Eleventy project

Drop the form snippet into a Eleventy page, component, or layout. Replace YOUR_ACCESS_KEY with the key from your dashboard. The form action is a hard-coded URL — no env vars or build-time wiring needed.

snippethtml

<form action="https://splitforms.com/api/submit" method="POST">
  …
</form>

STEP 03RECEIVE

Receive submissions

Dashboard updates live on Free. Starter adds email delivery, signed webhooks, CSV export, Slack/Discord forwarding, and BCC to your team.

inbox · 1 newjust now

FROM contact@yoursite.com

New newsletter subscriber

Maya Iyer maya@studio71.co

Loved the demo — quick question about pricing on the 3-year plan. Are usage limits per project or account-wide?

§ 03bNewsletter Signup Form (Email Capture)template-specific playbook

The reason this newsletter signup exists.

Webhooks into ConvertKit / Mailchimp / Substack / Beehiiv / Buttondown.

why it matters

Newsletter conversion benchmarks haven't moved much: ConvertKit / Substack landing pages convert at 1-2% of visitors, popup forms at 2-4%, content-upgrade lead magnets at 8-15%. The form itself is trivially simple (email field, optional name) but where it lives matters — exit-intent popup, scroll-triggered slide-in, footer inline, content-end inline all behave differently. Push the submission to your ESP (Mailchimp / ConvertKit / Substack / Beehiiv / Buttondown) via webhook so the welcome email fires automatically. GDPR / CASL require explicit consent — a checkbox or unbundled-consent text under the form covers it for EU and Canadian visitors.

route the submission

Pick the form placement

Popup (highest volume, also highest annoyance — set scroll or exit-intent triggers), inline footer (low volume, low friction), content-end inline (best conversion-quality combo).

Push to your ESP

Webhook the email to ConvertKit / Mailchimp / Substack / Beehiiv / Buttondown. Each has either a native webhook receiver or a Zapier connector. Welcome email fires automatically on add.

Add GDPR / CASL consent

EU visitors need explicit consent — add a 'I want to receive emails from [your brand]' checkbox or unbundled-consent text under the email field. Required text varies by jurisdiction; consult your privacy lawyer if in doubt.

§ 03cEleventy production notesnative path · deploy · gotchas

What changes when this newsletter signup lives in Eleventy.

These notes come from the Eleventy platform registry and are rendered on this template page so crawlers see the framework-specific answer without opening a separate guide.

without splitforms

Eleventy is a Node-based static site generator — it produces HTML at build time and ships nothing else. There is no runtime, no /api/contact endpoint, no hooks for handling a form POST. The historical workarounds: (a) deploy to Netlify and use Netlify Forms, (b) write a Cloudflare Worker that handles POST /contact and forwards to your email provider (~4 hours plus ongoing operation), or (c) use a third-party form API (Formspree, Web3Forms, Basin, splitforms). Eleventy's data cascade lets you neatly pull an access key from _data/site.js and use it in a Nunjucks/Liquid include — but the actual delivery layer is always external. Splitforms is the lowest-friction external option.

deploy notes

Eleventy deploys to any static host. The form posts cross-origin to splitforms.com so the host is irrelevant for delivery. Eleventy v3's ESM-only config is the major upgrade gotcha — .eleventy.js (CommonJS) silently stops exposing globals; rename to eleventy.config.mjs. Local dev runs on localhost:8080 — add to splitforms allowed-domains for testing or use a separate dev key. _data/site.js (not .json) lets you read from process.env; keep .env in gitignore. For 11ty + Netlify (the classic combo), you can use Netlify Forms instead, but you cap out at 100/mo — splitforms gives 500/mo and works on every host.

Eleventy gotcha

Eleventy v3 is ESM-only — your config must be .mjs

If you upgraded to Eleventy 3 and your .eleventy.js (CommonJS) silently stopped exposing globals, that's why. Rename to eleventy.config.mjs and use ESM export default. Otherwise addGlobalData('splitformsKey', …) won't reach your templates.

Eleventy gotcha

Liquid filters and Nunjucks filters have different names

{{ '/thanks/' | url }} works in Nunjucks (with the eleventy-plugin-url plugin). In Liquid, the filter is | url_for or you skip the filter entirely and write the path literally. Mismatched filter names render nothing — the form's redirect URL becomes empty.

Eleventy gotcha

Global data with sensitive values gets committed by accident

If you put your access key in _data/site.json (the obvious place), it ships to your repo. Use _data/site.js and read from process.env.SPLITFORMS_KEY instead — then add .env to gitignore. Eleventy auto-loads .env if you have dotenv installed.

Eleventy gotcha

Permalinks: false on the contact page makes the redirect fail

If your contact page has permalink: false (rare but possible), it's not built — and splitforms's redirect target points at a 404. Always ensure both the form page and the /thanks page have valid permalinks.

PATTERN A

Pattern A — Nunjucks include from `_includes/partials/`

Save as src/_includes/partials/contact-form.njk. Use from any template with {% include "partials/contact-form.njk" %}. Pulls the key from a global data file that reads process.env.SPLITFORMS_KEY. Use the same wiring for the newsletter signup fields on this page.

pattern-a.htmlhtml7 lines

01<form action="https://splitforms.com/api/submit" method="POST">
02  <input type="hidden" name="access_key" value="{{ splitformsKey }}" />
03  <input type="hidden" name="redirect"   value="{{ '/thanks/' | url }}" />
04  <input name="email" type="email" required />
05  <textarea name="message" required></textarea>
06  <button type="submit">Send</button>
07</form>

PATTERN B

Pattern B — Eleventy v3 ESM config

Eleventy 3 is ESM-only. Use eleventy.config.mjs and addGlobalData to wire the key from environment. Liquid templates work the same way — just save as .liquid. Use the same wiring for the newsletter signup fields on this page.

pattern-b.htmlhtml6 lines

01// eleventy.config.mjs
02import "dotenv/config";
03export default function (config) {
04  config.addGlobalData("splitformsKey", process.env.SPLITFORMS_KEY);
05  return { dir: { input: "src", output: "_site" } };
06}

§ 04Field-by-field rundown1 fields · names you POST

What every field actually does.

Each field below ships in the newsletter signup template — rename, remove, or add your own. Splitforms accepts any name you POST.

emailREQUIRED

Your email

Reply-to address — splitforms wires this so hitting reply goes back to the sender.

placeholder · you@example.com

§ 05Newsletter Signup on other frameworks21 frameworks · same backend

One backend. Every framework.

The same newsletter signup template works on every framework splitforms supports. Pick yours.

§ 06Questions9 answered

Newsletter Signup on Eleventy — FAQ.

Direct answers, no marketing fluff. Missing one? Email hello@splitforms.com.

01Does this newsletter signup work on Eleventy?

Yes. The form is plain HTML with a single POST endpoint, so it runs on any Eleventy site without server-side code, plugins, or SDKs. Drop the snippet into a Eleventy page or component and submissions land in your splitforms dashboard.

02How much does the newsletter signup cost on Eleventy?

Free for 500 submissions per month — no credit card, no trial. Pro is $5/mo for 5,000 submissions, and there's a one-time $59 3-year plan (15,000 submissions/mo for 36 months). The same pricing applies regardless of which framework hosts the form.

03Can I customize the fields?

Yes. The template ships with sensible defaults (your email…) — add, remove, or rename any of them. Splitforms accepts whatever fields you POST.

04How does spam protection work on the newsletter signup?

A hidden honeypot field catches dumb bots, and a tuned classifier scores the rest. You only see real submissions in your dashboard. No CAPTCHA, no friction for human users — and it works the same on Eleventy as on any other framework.

05Can I send the newsletter signup submissions to Slack or Discord?

Yes. Webhooks are available on Starter and above, with auto-formatted payloads for Slack, Discord, and WhatsApp (via CallMeBot). Or send raw signed JSON to any URL — Zapier, n8n, your own server. Configure in the splitforms dashboard.

06Will it work on a static Eleventy site?

Yes — the form posts directly to splitforms from the browser, so no server is involved. Works on Vercel, Netlify, GitHub Pages, Cloudflare Pages, S3, or any plain Apache host.

07Will my form trigger GDPR consent requirements?

If you have any EU or UK visitors, yes — GDPR requires explicit, freely-given consent for marketing emails. Add a separate consent checkbox (not pre-checked) below the email field. Same applies to CASL in Canada and PECR in the UK. US-only audiences fall under CAN-SPAM, which is less strict but still requires honest unsubscribe handling.

08How do I push to ConvertKit / Mailchimp / Substack / Beehiiv?

Webhook the submission as JSON. ConvertKit has a native webhook receiver per form; Mailchimp accepts via API or Zapier; Substack accepts via Beehiiv/Substack import API or Zapier; Beehiiv has direct webhook support. The newsletter platform fires the welcome sequence automatically on add.

09Does double opt-in hurt list growth?

Double opt-in drops list size by 20-30% but improves deliverability and engagement metrics — single-opt-in lists accumulate spam-trap addresses that tank inbox placement. Most serious senders run double opt-in for that reason. Substack and Beehiiv default to it.

§ 07Comparisonvs Web3Forms · vs Formspree

splitforms vs everything else.

Same drop-in API. More free submissions, Starter signed webhooks, MCP support no other backend has.

Feature	Web3Forms	Formspree	splitforms
Free monthly submissions	250	50	500
Custom fields beyond contact	Yes	Pro tier	Free
Webhooks (Slack / Discord)	Pro tier	Pro tier	Free, signed
AI / MCP submission inbox	No	No	Yes
Long-term plan (3-year flat)	—	—	$59 every 3 years

§ 08More templates for Eleventy5 adjacent patterns

Ship a newsletter signup on Eleventy in 60 seconds.

500 submissions per month, free forever. No credit card. Copy the snippet above and paste it into your Eleventy project.

Get free access key →Read the docs

founders pricing locked in · early access open

Newsletter Signup for Eleventy

Why Eleventy developers choose splitforms for newsletter signup

Yes — this is the shortest safe path for Eleventy.

Paste the HTML version, then replace YOUR_ACCESS_KEY.

Built for Eleventy developers who hate operating a backend.

Drop into any Eleventy project.

Generate, embed, receive.

Generate a free splitforms key

Paste the newsletter signup into your Eleventy project

Receive submissions

The reason this newsletter signup exists.

Pick the form placement

Push to your ESP

Add GDPR / CASL consent

What changes when this newsletter signup lives in Eleventy.

Eleventy v3 is ESM-only — your config must be .mjs

Liquid filters and Nunjucks filters have different names

Global data with sensitive values gets committed by accident

Permalinks: false on the contact page makes the redirect fail

Pattern A — Nunjucks include from `_includes/partials/`

Pattern B — Eleventy v3 ESM config

What every field actually does.

Your email

One backend. Every framework.

Newsletter Signup on Eleventy — FAQ.

splitforms vs everything else.

Other ready-to-ship Eleventy forms.

Ship a newsletter signup on Eleventy in 60 seconds.