NEWSLETTER SIGNUP · NEXT.JS

Newsletter Signup for Next.js

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 Next.js

Form.tsxtsx41 lines

01'use client';
02 
03import { useState, type FormEvent } from 'react';
04 
05export default function NewsletterForm() {
06  const [status, setStatus] = useState<'idle' | 'sending' | 'sent' | 'error'>('idle');
07 
08  async function onSubmit(e: FormEvent<HTMLFormElement>) {
09    e.preventDefault();
10    setStatus('sending');
11 
12    const data = new FormData(e.currentTarget);
13    data.set('access_key', 'YOUR_ACCESS_KEY');
14    data.set('subject', 'New newsletter subscriber');
15 
16    const res = await fetch('https://splitforms.com/api/submit', {
17      method: 'POST',
18      body: data,
19      headers: { Accept: 'application/json' },
20    });
21 
22    const json = await res.json();
23    setStatus(json.success ? 'sent' : 'error');
24    if (json.success) e.currentTarget.reset();
25  }
26 
27  if (status === 'sent') return <p>Thanks — we&rsquo;ll be in touch.</p>;
28 
29  return (
30    <form onSubmit={onSubmit}>
31      <label htmlFor="email">Your email *</label>
32      <input id="email" type="email" name="email" placeholder="you@example.com" required />
33 
34      <button type="submit" disabled={status === 'sending'}>
35        {status === 'sending' ? 'Sending…' : 'Send'}
36      </button>
37 
38      {status === 'error' && <p>Something went wrong. Try again.</p>}
39    </form>
40  );
41}

500

submissions / mo, free

fields, ready to ship

code outputs

60s

from copy to inbox

§ 00Next.js + Newsletter Signupplatform-specific integration guide

Why Next.js developers choose splitforms for newsletter signup

Next.js Server Actions handle the submit side but still leave you wiring SMTP, spam filtering, file uploads, and a dashboard. splitforms replaces all of that with one <code>fetch('/api/submit')</code> call. The newsletter signup works identically in App Router and Pages Router — it's just a <code>FormData</code> POST, no router-specific magic. Because Next.js pre-renders pages, the form HTML is in the DOM before any JavaScript executes, meaning instant Time-to-Interactive. The honeypot field is invisible to users but catches bots that scrape rendered HTML — especially important for Next.js sites where the form HTML is statically generated and predictable.

§ 00Quick answerReact / Next.js · marketing

Yes — this is the shortest safe path for Next.js.

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

best implementation

Paste the React / Next.js version, then replace YOUR_ACCESS_KEY.

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

native next.js reality

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 × Next.jswhy this combination, in 80 words

Built for Next.js developers who hate operating a backend.

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

Splitforms is the form backend for Next.js 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 codeReact / Next.js · 41 lines

Drop into any Next.js project.

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

Form.tsxtsx41 lines

01'use client';
02 
03import { useState, type FormEvent } from 'react';
04 
05export default function NewsletterForm() {
06  const [status, setStatus] = useState<'idle' | 'sending' | 'sent' | 'error'>('idle');
07 
08  async function onSubmit(e: FormEvent<HTMLFormElement>) {
09    e.preventDefault();
10    setStatus('sending');
11 
12    const data = new FormData(e.currentTarget);
13    data.set('access_key', 'YOUR_ACCESS_KEY');
14    data.set('subject', 'New newsletter subscriber');
15 
16    const res = await fetch('https://splitforms.com/api/submit', {
17      method: 'POST',
18      body: data,
19      headers: { Accept: 'application/json' },
20    });
21 
22    const json = await res.json();
23    setStatus(json.success ? 'sent' : 'error');
24    if (json.success) e.currentTarget.reset();
25  }
26 
27  if (status === 'sent') return <p>Thanks — we&rsquo;ll be in touch.</p>;
28 
29  return (
30    <form onSubmit={onSubmit}>
31      <label htmlFor="email">Your email *</label>
32      <input id="email" type="email" name="email" placeholder="you@example.com" required />
33 
34      <button type="submit" disabled={status === 'sending'}>
35        {status === 'sending' ? 'Sending…' : 'Send'}
36      </button>
37 
38      {status === 'error' && <p>Something went wrong. Try again.</p>}
39    </form>
40  );
41}

ALTPrefer plain HTML? View the universal newsletter signup HTML snippet12 lines

form.htmlHTML

<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 subscriber">

  <label for="email">Your email *</label>
  <input id="email" type="email" name="email" placeholder="you@example.com" required>

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

  <button type="submit">Send</button>
</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 Next.js project

Drop the form snippet into a Next.js 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.

snippettsx

'use client';
  …
</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.

§ 03cNext.js production notesnative path · deploy · gotchas

What changes when this newsletter signup lives in Next.js.

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

without splitforms

Without splitforms, you'd write a route handler at app/api/contact/route.ts, parse the FormData, configure SMTP via nodemailer or Resend (~10 minutes of secrets wrangling), add a Postgres or SQLite store for submissions, and then bolt on rate limiting, a honeypot check, an email-classifier or reCAPTCHA, and webhook fan-out. Server actions made the wiring slightly tidier in Next 14+, but the operational cost stays the same: a function with a runtime, a database, an outbound email provider, an inbox to monitor, and your name on the spam-filter incident report. Splitforms collapses all of that into a POST to a single URL.

deploy notes

On Vercel, the form works on every plan tier — server actions and client components both run inside the same edge/serverless function. Don't put the splitforms fetch inside a Vercel cron or background function (it's user-facing, latency matters). On Netlify with the Next runtime, server actions need the latest @netlify/plugin-nextjs (≥5.6). For self-hosted / Docker: configure output: 'standalone' in next.config.ts and pass SPLITFORMS_KEY as a runtime env var — never bake it into the image. For static export (output: 'export'), use the client-component path only — server actions aren't supported in static mode.

Next.js gotcha

Don't expose your access key client-side without domain locking

Inlining access_key in a "use client" component makes the key visible to anyone who views source. That's fine if you've enabled allowed-domains in your Splitforms dashboard (Settings → Security) — anyone copying the key from your bundle can't use it from a different origin. If you haven't, use a server action so the key stays on the server.

Next.js gotcha

Server actions need `'use server'` and a real form, not fetch

If you submit to a server action via <form action={myAction}>, Next handles the FormData serialization for you. If you call the action manually with fetch, you have to set the right Content-Type and stringify yourself. Pick one path and stick with it — mixing causes 'Server Action invalid' errors.

Next.js gotcha

App Router + Suspense + useSearchParams = static-prerender bailout

If your form reads ?next=/something to support post-submit redirects, useSearchParams forces the page out of static generation. Either wrap the inner component in a <Suspense fallback={<Skeleton/>}> so the wrapper still prerenders, or accept dynamic rendering for the form route only.

Next.js gotcha

Vercel Edge runtime can't read FormData from `multipart/form-data`

If your route handler uses export const runtime = 'edge' and the form posts as multipart (file inputs), it'll silently miss fields. Use application/x-www-form-urlencoded or remove the edge runtime declaration.

PATTERN A

Pattern A — server action (no client JS, key stays server-side)

Form posts to a server action; the action appends the access key from process.env.SPLITFORMS_KEY and proxies to splitforms. Works without JavaScript, key never reaches the bundle. Use the same wiring for the newsletter signup fields on this page.

pattern-a.tsxtsx10 lines

01// app/actions/contact.ts
02"use server";
03import { redirect } from "next/navigation";
04 
05export async function submitContact(formData: FormData) {
06  formData.append("access_key", process.env.SPLITFORMS_KEY!);
07  const res = await fetch("https://splitforms.com/api/submit", { method: "POST", body: formData });
08  if (!(await res.json()).success) throw new Error("Submission failed");
09  redirect("/thanks");
10}

PATTERN B

Pattern B — client component with fetch and inline status

'use client' component using useState for a 4-state status machine. Lets you show a spinner, inline errors, optimistic resets — at the cost of a hydration boundary. Use NEXT_PUBLIC_SPLITFORMS_KEY and rely on splitforms' domain-locking for safety. Use the same wiring for the newsletter signup fields on this page.

pattern-b.tsxtsx17 lines

01"use client";
02import { useState } from "react";
03export default function ContactForm() {
04  const [s, setS] = useState<"idle" | "loading" | "ok" | "err">("idle");
05  return (
06    <form onSubmit={async (e) => {
07      e.preventDefault(); setS("loading");
08      const fd = new FormData(e.currentTarget);
09      fd.append("access_key", process.env.NEXT_PUBLIC_SPLITFORMS_KEY!);
10      const r = await fetch("https://splitforms.com/api/submit", { method: "POST", body: fd });
11      setS((await r.json()).success ? "ok" : "err");
12    }}>
13      <input name="email" type="email" required />
14      <button disabled={s === "loading"}>{s === "loading" ? "…" : "Send"}</button>
15    </form>
16  );
17}

§ 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 Next.js — FAQ.

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

01Does this newsletter signup work on Next.js?

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

02How much does the newsletter signup cost on Next.js?

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 Next.js 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 Next.js 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 Next.js5 adjacent patterns

Ship a newsletter signup on Next.js in 60 seconds.

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

Get free access key →Read the docs

founders pricing locked in · early access open

Newsletter Signup for Next.js

Why Next.js developers choose splitforms for newsletter signup

Yes — this is the shortest safe path for Next.js.

Paste the React / Next.js version, then replace YOUR_ACCESS_KEY.

Built for Next.js developers who hate operating a backend.

Drop into any Next.js project.

Generate, embed, receive.

Generate a free splitforms key

Paste the newsletter signup into your Next.js 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 Next.js.

Don't expose your access key client-side without domain locking

Server actions need `'use server'` and a real form, not fetch

App Router + Suspense + useSearchParams = static-prerender bailout

Vercel Edge runtime can't read FormData from `multipart/form-data`

Pattern A — server action (no client JS, key stays server-side)

Pattern B — client component with fetch and inline status

What every field actually does.

Your email

One backend. Every framework.

Newsletter Signup on Next.js — FAQ.

splitforms vs everything else.

Other ready-to-ship Next.js forms.

Ship a newsletter signup on Next.js in 60 seconds.