How to create a “fake door” landing page (with demo / fake CTA buttons) to validate an idea fast

Hey builders 👋

I’ve been testing ideas without actually building full products, and this approach has saved me a TON of time. It’s called a “fake door” or smoke test landing page.

Here’s exactly how you can do it:

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🧠 The idea

Instead of building your product, you build a landing page that looks real — with features, pricing, and CTA buttons — but the product itself doesn’t exist yet.

You’re testing:

👉 Do people WANT this?

👉 Will they click / sign up / try to buy?

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⚙️ Step-by-step

1. Create a simple landing page

Use tools like:

- Wix

- Webflow

- Framer

- Or even plain HTML (Cursor works great)

Include:

- Clear headline (problem + promise)

- 2–3 feature sections

- Mock UI screenshots (Figma or AI-generated)

- Social proof (optional but helps)

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2. Add a strong CTA (this is the key part)

Examples:

- “Start Free Trial”

- “Get Early Access”

- “Generate My Page”

- “Try Demo”

Make it look REAL.

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3. Make the CTA “fake” (but useful)

When users click, don’t break the experience. Do one of these:

Option A – Email capture (best)

- Show a popup:

“We’re launching soon. Want early access?”

- Collect email

Option B – Demo illusion

- Show a loading screen (2–3 seconds)

- Then display:

“We’re still building this. Join the waitlist.”

Option C – Payment intent test (advanced)

- Show pricing → “Buy now”

- After click:

“This feature is coming soon. Reserve your spot.”

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4. Track everything

Use:

- Google Analytics / Hotjar

- Or simple event tracking

Track:

- Page visits

- CTA clicks

- Conversion rate

This is your REAL validation.

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5. Bonus: make it feel legit

- Add animations (even fake ones)

- Use realistic UI mockups

- Show “activity” like fake dashboards

The more real it feels → the better the signal.

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📊 What success looks like

- 10–20% CTA click rate → strong signal

- People leaving emails → even better

- People trying to pay → 🔥 (you’ve got something)

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⚠️ Important

Don’t mislead people long-term.

Be transparent after the click (“coming soon”, “early access”).

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💡 Why this works

You’re testing behavior, not opinions.

People say “cool idea” all the time.

Clicks and emails = truth.