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Sign up at splitforms.com and create a form. Your access key appears in the dashboard instantly — no credit card required.
Form to webhook
Send an HTML form to a webhook, as signed JSON.
Point your HTML form at one endpoint and every submission is forwarded to any webhook URL as HMAC-signed JSON — plus stored and emailed, so you never lose a lead.
- HMAC-signed JSON
- 500 free total
- 1-click webhooks
No backend
Point your form's action at one endpoint — no server route to build or deploy.
Signed JSON
Every delivery carries an HMAC-SHA256 X-Splitforms-Signature header you can verify.
Never lose a lead
Each submission is also stored in your dashboard and emailed to you, on every plan.
Quick start
Point your HTML form at one endpoint.
Point the action at the endpoint, add your access key, then paste a webhook URL in the dashboard. That's the whole integration — no server code, no redeploys.
<form action="https://splitforms.com/api/submit" method="POST">
<input type="hidden" name="access_key" value="YOUR_ACCESS_KEY" />
<input name="email" type="email" required />
<textarea name="message" required></textarea>
<!-- honeypot: must stay empty -->
<input type="checkbox" name="botcheck" style="display:none" tabindex="-1" />
<button type="submit">Send</button>
</form>
<!-- In the splitforms dashboard:
Webhooks tab -> Add URL -> https://your-app.com/webhooks/contact
(paid plans) -->Step by step
How to send an HTML form to a webhook.
No server, no SMTP setup — six steps from a plain HTML form to a verified, signed webhook delivery.
Point your HTML form at splitforms
Set action="https://splitforms.com/api/submit" and method="POST" on your existing form. No JavaScript required for the base submission.
Upgrade to Pro for webhook delivery
Free stores every submission and emails you. Webhook forwarding unlocks on Pro ($5/mo, 5,000 submissions) — upgrade from the dashboard in one click.
Add your webhook URL
Open the Webhooks tab on your form and paste the destination URL — Slack, Discord, your own API, or a Zapier/Make/n8n catch-hook.
Send a test submission
Submit the form once. Your endpoint should receive a POST with a JSON body and an X-Splitforms-Signature header within seconds.
Verify the signature
Compute HMAC-SHA256 of the raw request body with your webhook secret and compare it to the sha256=-prefixed header before trusting the payload.
Where submissions go
How do you send a form to a webhook?
splitforms is a hosted form backend: set your HTML form's action to https://splitforms.com/api/submit and every submission is stored, emailed, and — on paid plans — forwarded as an HMAC-signed JSON POST to any webhook URL. One endpoint routes to Slack, Zapier, or your own API, with no server code. Prefer an inbox? Pair it with form to email.
- Receive HTML, FormData, and JSON from one endpoint
- Sign every delivery with an HMAC-SHA256 header
- Route to Slack, Discord, Zapier, Make, n8n, Sheets, Notion, or your own API
- Stored and emailed on every plan — a missed webhook never loses the lead
Webhook payload
What does the webhook payload look like?
A single HTTP POST with a JSON body — whatever your form fields are named becomes the payload's keys, so there is no fixed schema to map. Every request carries an X-Splitforms-Signature header (HMAC-SHA256, prefixed sha256=) your endpoint checks before trusting the data. Test a live delivery with the webhook tester.
- One HTTP POST with a JSON body — your field names become the keys
- X-Splitforms-Signature (HMAC-SHA256, sha256=) on every request
- 8-second timeout with one automatic retry on outages — the copy is still saved and emailed
Spam filtering
Will spam reach your webhook?
Rarely. Every submission clears a honeypot field, a time-trap, and server-side content heuristics before it is stored or forwarded, and splitforms rate-limits incoming submissions to 6 per minute per IP. Turn on reCAPTCHA v2 with your own secret for an extra layer.
- Honeypot + time-trap + content heuristics on every submission
- Rate-limited to 6 submissions per minute per IP
- Optional reCAPTCHA v2 with your own secret key
How SplitForms works
What happens after someone submits your form?
splitforms receives the submission, filters spam, saves it to your dashboard and emails you — then, on paid plans, sends it on to your webhooks and integrations. No backend infrastructure to build.
Add your endpoint
Point your form to your unique SplitForms endpoint. That's it.
Receive submissions
We instantly capture and organize every submission in your inbox.
Route anywhere
Send data to email, spreadsheets, CRMs, webhooks, and 7,000+ apps.
No credit card required. Set up in under 60 seconds.
Connect & automate
Where can submissions go besides email?
On paid plans, submissions can also go to Slack, Discord, Google Sheets, Notion, Airtable, Zapier or any signed webhook — and splitforms works on the platforms you build on, from WordPress and Shopify to Next.js. With Stripe connected, your forms can take payments too.
NewTake payments on your formsDeposits, bookings, order forms — submitters check out through Stripe and the money goes straight to your Stripe account. Included on every paid plan.See plans →Form to webhook FAQ
Form to webhook questions.
View all FAQsHow do I send an HTML form to a webhook?
Set your form's action to https://splitforms.com/api/submit and add a hidden access_key input. splitforms receives the POST, stores it in your dashboard, and — on paid plans — forwards the submission as a signed JSON POST to any webhook URL you add under the Webhooks tab.
Can I send the same form submission to multiple webhooks?
Yes. Add more than one webhook URL to the same form. Each destination gets its own delivery attempt, so a Slack outage doesn't stop your other integrations or the copy stored in your dashboard.
Are splitforms webhooks signed?
Yes. Every outbound webhook includes an HMAC-SHA256 signature in the X-Splitforms-Signature header, prefixed sha256=, so your receiving endpoint can verify the payload really came from splitforms.
What happens if my webhook endpoint is down?
splitforms sends each webhook with an 8-second timeout and automatically retries once, after a short pause, when the delivery failed with a network error, timeout, or 5xx (4xx responses are not retried). The submission is still stored in your dashboard and emailed to you — email notifications are included on every plan, including Free — so a webhook failure never means a lost lead.
Do webhooks work on the Free plan?
No. Webhook delivery starts on the Pro plan ($5/mo, 5,000 submissions/mo). Free (500 submissions total) still includes unlimited forms, email notifications, spam filtering, and dashboard storage — upgrade only when you're ready to route submissions automatically.
What does the webhook payload look like?
Your endpoint receives an HTTP POST with a JSON body containing whatever fields the visitor submitted, plus the X-Splitforms-Signature header for verification. There's no separate schema to learn — the form's own fields become the payload's keys.
Can I send form submissions to Zapier, Make, or n8n?
Yes. splitforms doesn't have a native Zapier app, but Zapier's "Webhooks by Zapier" trigger, Make's webhook module, and n8n's Webhook node all accept a splitforms webhook URL directly — paste the catch-hook URL into the Webhooks tab like any other destination.
Will spam submissions reach my webhook?
Rarely. Every submission passes a honeypot field, a time-trap check, and server-side content heuristics before it's stored or forwarded, and splitforms rate-limits incoming submissions to 6 per minute per IP. You can also turn on reCAPTCHA v2 with your own secret for extra filtering.
Simple pricing
How much does splitforms cost?
Free gives you 500 submissions for $0 — no card, no time limit. Pro is $5/month for 5,000 submissions a month, and Annual is $49/year for 15,000 a month with every Pro feature.
Free
$0— 500 submissions
For side projects and indie devs.
- 500 free submissions
- Unlimited forms
- Email notifications included
- Smart spam filtering
- Submissions dashboard
- Redirect after submit
- MCP server included
Recommended
Pro
$5/ month
Billed monthly
Every paid feature, for agencies and growing products.
- 5,000 submissions / mo
- Unlimited forms
- Webhooks and integrations
- CC/BCC, auto-replies and routing
- File uploads with 500 MB storage
- Stripe payments on your forms
- 3 team seats
- Cancel anytime
Annual
$49/ year
About $4.08/mo, billed yearly
Every Pro feature with triple the volume — $0.27 per 1,000 at full use.
- 15,000 submissions / mo
- Unlimited forms
- Everything in Pro
- File uploads with 5 GB storage
- 3 team seats
- Priority email support
No credit card required on Free • Cancel anytime • Full pricing and FAQ