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CONTACT FORM (WITH PHONE) · AJAX (VANILLA JS)

Contact Form (with phone) for AJAX (vanilla JS)

Name, email, phone, company, reason — for B2B inquiries that need qualification. Free for 500 submissions per month — no backend, no SDK, no plugin.

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500/mo free·no card·drop-in for AJAX (vanilla JS)
form.htmlhtml30 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 detailed contact submission">
04 
05  <label for="name">Full name *</label>
06  <input id="name" type="text" name="name" placeholder="Jane Builder" required>
07  <label for="email">Work email *</label>
08  <input id="email" type="email" name="email" placeholder="jane@company.com" required>
09  <label for="phone">Phone *</label>
10  <input id="phone" type="tel" name="phone" placeholder="+1 415 555 0142" required>
11  <label for="company">Company</label>
12  <input id="company" type="text" name="company" placeholder="Acme Inc">
13  <label for="reason">What's this about? *</label>
14  <select id="reason" name="reason" required>
15    <option value="">Choose…</option>
16    <option>Sales / pricing</option>
17    <option>Partnerships</option>
18    <option>Press / media</option>
19    <option>Support</option>
20    <option>Careers</option>
21    <option>Other</option>
22  </select>
23  <label for="message">Message *</label>
24  <textarea id="message" name="message" placeholder="Give us context — links, dates, deal size, anything we should know." required></textarea>
25 
26  <!-- honeypot — bots fill every field -->
27  <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off">
28 
29  <button type="submit">Send</button>
30</form>
500
submissions / mo, free
6
fields, ready to ship
5
code outputs
60s
from copy to inbox
§ 00AJAX (vanilla JS) + Contact Form (with phone)platform-specific integration guide

Why AJAX (vanilla JS) developers choose splitforms for contact form (with phone)

The contact form (with phone) on this page integrates with AJAX (vanilla JS)'s development workflow using the form markup in your AJAX (vanilla JS) project. Whether you're deploying to a static host or a server-rendered platform, the form posts standard <code>FormData</code> to splitforms, so your backend complexity stays at zero. AJAX (vanilla JS)'s ecosystem has strong tooling for UI, but form delivery is a separate concern that splitforms handles independently — Free includes spam filtering and a submissions dashboard; Starter adds email notifications and webhooks.

§ 00Quick answerHTML · lead capture

Yes — this is the shortest safe path for AJAX (vanilla JS).

Use the HTML snippet on this page, keep the contact form (with phone) fields visible in your AJAX (vanilla JS) 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 full name, work email, phone, company, what's this about?, message. Required fields are full name, work email, phone, what's this about? and message.

native ajax (vanilla js) reality

Vanilla JS / AJAX forms have been the no-framework default since jQuery's heyday.

use case fit

A contact form with a phone number field that auto-formats as the user types — (555) 123-4567 emerges from raw digits. Pure pattern validation, optional JS mask for the live formatting.

§ 01Contact Form (with phone) × AJAX (vanilla JS)why this combination, in 80 words

Built for AJAX (vanilla JS) developers who hate operating a backend.

Splitforms is the form backend for AJAX (vanilla JS) sites. One POST endpoint, no SDK, no plugin — drop the contact form (with phone) into a page and ship.

Splitforms is the form backend for AJAX (vanilla 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 codeHTML · 30 lines

Drop into any AJAX (vanilla JS) project.

Replace YOUR_ACCESS_KEY with your splitforms key, paste into a AJAX (vanilla JS) page, and ship. No build-time integration required.

form.htmlhtml30 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 detailed contact submission">
04 
05  <label for="name">Full name *</label>
06  <input id="name" type="text" name="name" placeholder="Jane Builder" required>
07  <label for="email">Work email *</label>
08  <input id="email" type="email" name="email" placeholder="jane@company.com" required>
09  <label for="phone">Phone *</label>
10  <input id="phone" type="tel" name="phone" placeholder="+1 415 555 0142" required>
11  <label for="company">Company</label>
12  <input id="company" type="text" name="company" placeholder="Acme Inc">
13  <label for="reason">What's this about? *</label>
14  <select id="reason" name="reason" required>
15    <option value="">Choose…</option>
16    <option>Sales / pricing</option>
17    <option>Partnerships</option>
18    <option>Press / media</option>
19    <option>Support</option>
20    <option>Careers</option>
21    <option>Other</option>
22  </select>
23  <label for="message">Message *</label>
24  <textarea id="message" name="message" placeholder="Give us context — links, dates, deal size, anything we should know." required></textarea>
25 
26  <!-- honeypot — bots fill every field -->
27  <input type="checkbox" name="botcheck" style="display:none" tabindex="-1" autocomplete="off">
28 
29  <button type="submit">Send</button>
30</form>
§ 03Setup3 steps · 60 seconds · zero config

Generate, embed, receive.

Three actions stand between you and your first contact form (with phone) submission. None of them require a backend, a database, or a CAPTCHA library.

STEP 01GENERATE

Generate a free splitforms key

Sign in at splitforms.com — your access key is created instantly. No credit card, no setup wizard, no SDK to install.

Create your form
key=sk_live_••••••••
STEP 02EMBED

Paste the contact form (with phone) into your AJAX (vanilla JS) project

Drop the form snippet into a AJAX (vanilla 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.

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 detailed contact submission
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?
§ 03bPhone Number Input Form (with masked input)template-specific playbook

The reason this contact form (with phone) exists.

Mobile-friendly numeric keypad, live mask, format-tolerant.

why it matters

Phone fields suffer from format chaos — users type +1 555 123 4567, (555) 123 4567, 555.123.4567, 5551234567. Three options: accept anything and normalize server-side (best for international), use a pattern attribute for client-side validation (good for US-only), or apply a JavaScript mask that formats as the user types (highest conversion, more code). splitforms accepts any format and your form's UX is whichever approach fits your audience.

route the submission
01

Use type="tel" not type="text"

Mobile keyboards open the numeric keypad for tel inputs. Desktop accepts the same characters as text but signals intent.

02

Add a pattern attribute for validation

`pattern="[0-9() +-]+"` allows the common phone characters. Or use a strict US format: `pattern="\(?\d{3}\)?[ -]?\d{3}[ -]?\d{4}"`.

03

(Optional) Add the JS mask

On input, strip non-digits and reformat to `(XXX) XXX-XXXX`. The mask runs on every keystroke, giving live formatting feedback.

§ 03cAJAX (vanilla JS) production notesnative path · deploy · gotchas

What changes when this contact form (with phone) lives in AJAX (vanilla JS).

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

without splitforms

Vanilla JS / AJAX forms have been the no-framework default since jQuery's heyday. Without splitforms, the 'AJAX' part is one fetch line; the operational part is everything else: a backend route, an SMTP provider, a database for submissions, a honeypot or reCAPTCHA, a thank-you page, error handling for HTTP 4xx/5xx, retry logic. For 'JS-only on a static host' setups (Cloudflare Pages, GitHub Pages, S3), there's literally no server to run the route on — historically that meant Formspree, Formspark, Web3Forms, Basin. Splitforms is the modern entry: same shape, better free tier, better spam filtering, and signed webhooks from Starter.

deploy notes

Vanilla JS deploys to any static host — the snippet is HTML + inline <script>, no build step. CSP: if your site sets connect-src 'self', add https://splitforms.com to the directive or fetch is blocked. Browser support: native fetch is in every browser back to Edge 18 — the snippet runs without polyfills on every market-share-relevant browser. The progressive-enhancement variant (Pattern B) keeps the form working when JS fails to load — useful on flaky networks, ad-blocked clients, or for accessibility tools that disable JS.

AJAX (vanilla JS) gotcha

Forgetting e.preventDefault() reloads the page

Without preventDefault, the browser does its own form submission to wherever the form's action attribute points (or the current page) AND your fetch runs. You see a flash, the page reloads, and your handler's effects are lost.

AJAX (vanilla JS) gotcha

FormData includes ALL form fields — even disabled ones get dropped

new FormData(form) skips inputs without a name attribute, skips disabled inputs, skips unchecked checkboxes/radios. If a field doesn't show up in your splitforms inbox, check whether it's disabled at submit time.

AJAX (vanilla JS) gotcha

fetch() doesn't reject on HTTP 4xx/5xx — only network errors

If splitforms returns a 401 (bad key) or 429 (rate limit), fetch resolves successfully. You have to check res.ok or data.success yourself. Wrapping in try/catch only catches network failures, not HTTP errors.

AJAX (vanilla JS) gotcha

Double-click submit fires two requests

Without disabling the button on the first click, a quick double-click sends two POSTs. Both succeed; the user sees one success message; you see two submissions. Always set button.disabled = true at the start of the handler.

PATTERN A

Pattern A — fetch + FormData + status element

Single submit listener. new FormData(form) reads inputs, append the access key, POST. Update an aria-live status <p> with the result. ~25 lines, no library. Use the same wiring for the contact form (with phone) fields on this page.

pattern-a.htmlhtml16 lines
01<form id="cf">
02  <input name="email" type="email" required />
03  <textarea name="message" required></textarea>
04  <button type="submit">Send</button>
05  <p id="msg" aria-live="polite"></p>
06</form>
07<script>
08  document.getElementById("cf").addEventListener("submit", async (e) => {
09    e.preventDefault();
10    const fd = new FormData(e.currentTarget);
11    fd.append("access_key", "YOUR_ACCESS_KEY");
12    const r = await fetch("https://splitforms.com/api/submit", { method: "POST", body: fd });
13    const data = await r.json();
14    document.getElementById("msg").textContent = data.success ? "Thanks!" : (data.message || "Try again");
15  });
16</script>
PATTERN B

Pattern B — progressive enhancement (works without JS)

Form has a real action attribute and a redirect hidden field — works with JS disabled (browser POSTs natively, splitforms 302s). When JS is available, the listener intercepts for inline UX. Best of both worlds, no compromise. Use the same wiring for the contact form (with phone) fields on this page.

pattern-b.htmlhtml13 lines
01<form id="cf" action="https://splitforms.com/api/submit" method="POST">
02  <input type="hidden" name="access_key" value="YOUR_ACCESS_KEY" />
03  <input type="hidden" name="redirect"   value="/thanks.html" />
04  <input name="email" type="email" required />
05  <button type="submit">Send</button>
06</form>
07<script>
08  document.getElementById("cf").addEventListener("submit", async (e) => {
09    e.preventDefault();
10    const r = await fetch(e.target.action, { method: "POST", body: new FormData(e.target) });
11    if ((await r.json()).success) location.href = "/thanks.html";
12  });
13</script>
§ 04Field-by-field rundown6 fields · names you POST

What every field actually does.

Each field below ships in the contact form (with phone) template — rename, remove, or add your own. Splitforms accepts any name you POST.

nameREQUIRED
TEXT

Full name

Greeting + dashboard label so submissions don't all read 'anonymous'.

placeholder · Jane Builder
emailREQUIRED
EMAIL

Work email

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

placeholder · jane@company.com
phoneREQUIRED
PHONE

Phone

Faster qualification — phone leads convert ~3× higher than email-only on B2B forms.

placeholder · +1 415 555 0142
company
TEXT

Company

Lets you sort enterprise vs SMB inquiries before you reply.

placeholder · Acme Inc
reasonREQUIRED
SELECT

What's this about?

Routes the lead to the right inbox folder or teammate.

Sales / pricingPartnershipsPress / mediaSupportCareersOther
messageREQUIRED
TEXTAREA

Message

Free-text context — what the visitor actually wants you to know.

placeholder · Give us context — links, dates, deal size, anything we should know.
§ 05Contact Form (with phone) on other frameworks22 frameworks · same backend

One backend. Every framework.

The same contact form (with phone) template works on every framework splitforms supports. Pick yours.

Contact Form (with phone) for HTML/forms/html/contact-detailed →Contact Form (with phone) for Next.js/forms/nextjs/contact-detailed →Contact Form (with phone) for React/forms/react/contact-detailed →Contact Form (with phone) for Vue/forms/vue/contact-detailed →Contact Form (with phone) for Astro/forms/astro/contact-detailed →Contact Form (with phone) for Svelte/forms/svelte/contact-detailed →Contact Form (with phone) for Webflow/forms/webflow/contact-detailed →Contact Form (with phone) for Carrd/forms/carrd/contact-detailed →Contact Form (with phone) for WordPress/forms/wordpress/contact-detailed →Contact Form (with phone) for Tailwind CSS/forms/tailwind/contact-detailed →Contact Form (with phone) for Hugo/forms/hugo/contact-detailed →Contact Form (with phone) for Gatsby/forms/gatsby/contact-detailed →Contact Form (with phone) for Eleventy/forms/eleventy/contact-detailed →Contact Form (with phone) for SvelteKit/forms/sveltekit/contact-detailed →Contact Form (with phone) for Framer/forms/framer/contact-detailed →Contact Form (with phone) for Nuxt/forms/nuxt/contact-detailed →Contact Form (with phone) for Bootstrap/forms/bootstrap/contact-detailed →Contact Form (with phone) for Jekyll/forms/jekyll/contact-detailed →Contact Form (with phone) for JavaScript/forms/javascript/contact-detailed →Contact Form (with phone) for Cloudflare Pages/forms/cloudflare/contact-detailed →Contact Form (with phone) for Netlify/forms/netlify/contact-detailed →Contact Form (with phone) for Vercel/forms/vercel/contact-detailed →
§ 06Questions9 answered

Contact Form (with phone) on AJAX (vanilla JS) — FAQ.

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

01Does this contact form (with phone) work on AJAX (vanilla JS)?
Yes. The form is plain HTML with a single POST endpoint, so it runs on any AJAX (vanilla JS) site without server-side code, plugins, or SDKs. Drop the snippet into a AJAX (vanilla JS) page or component and submissions land in your splitforms dashboard.
02How much does the contact form (with phone) cost on AJAX (vanilla 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 (full name, work email, phone, company…) — add, remove, or rename any of them. Splitforms accepts whatever fields you POST.
04How does spam protection work on the contact form (with phone)?
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 AJAX (vanilla JS) as on any other framework.
05Can I send the contact form (with phone) 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 AJAX (vanilla 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.
07Why use type="tel" if it doesn't do anything special on desktop?
Two reasons. (1) Mobile keyboards: tel triggers the numeric keypad, dramatically reducing typos. (2) Accessibility: screen readers announce the field type, helping users with assistive tech understand what's expected. The 'no desktop benefit' is a feature, not a bug — the behavior matches user intent.
08Should I validate international or US-only?
Depends on your audience. International contact forms should accept any format (use a permissive pattern + server-side normalization). US-only forms can use a strict pattern that matches `(555) 123-4567`. Either way, splitforms accepts whatever format the user submits — the validation is for UX, not data integrity.
09Does the JS mask work with paste?
Yes — listen for both `input` and `paste` events, and reformat on every change. The pattern only validates on submit, so the mask gives live feedback as the user types or pastes.
§ 07Comparisonvs Web3Forms · vs Formspree

splitforms vs everything else.

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

FeatureWeb3FormsFormspreesplitforms
Free monthly submissions25050500
Custom fields beyond contactYesPro tierFree
Webhooks (Slack / Discord)Pro tierPro tierFree, signed
AI / MCP submission inboxNoNoYes
Long-term plan (3-year flat)——$59 every 3 years
§ 08More templates for AJAX (vanilla JS)0 adjacent patterns

Other ready-to-ship AJAX (vanilla JS) forms.

Same backend, different qualifying fields. Click through to copy the snippet.

✦ keep browsing on AJAX (vanilla JS)
    ✦ contact form (with phone) on other frameworks
    ✻ ✻ ✻

    Ship a contact form (with phone) on AJAX (vanilla JS) in 60 seconds.

    500 submissions per month, free forever. No credit card. Copy the snippet above and paste it into your AJAX (vanilla JS) project.

    Get free access key →Read the docs
    founders pricing locked in · early access open