How to Add a Floating CTA Button to an Astro Site

Astro is built around shipping zero JavaScript by default, making it a perfect match for CTA Button Generator's pure HTML + CSS output. Design your button, export the code, and add it to your base layout. No client-side JavaScript needed.

Why Add a CTA Button to Astro?

Astro's entire philosophy is shipping less JavaScript, and a pure HTML + CSS CTA button aligns perfectly with that goal. For content-heavy sites like blogs, documentation, and marketing pages — Astro's sweet spot — a floating CTA keeps conversion actions visible without adding a single byte of JavaScript to the bundle. It's the rare addition that improves conversion without compromising performance.

Step-by-Step Instructions

Design your CTA button

Open the CTA Button Generator and customize your button using the visual editor. Pick colors, position, animation, hover effects, icon, and font. The live preview updates in real time so you see exactly what your visitors will get.

Export your code

When you are happy with the design, click "Get Code" to export a clean HTML + CSS snippet. The code is lightweight, has zero dependencies, and works on any website.

Open your base layout

In your Astro project, open the base layout file (typically src/layouts/BaseLayout.astro or similar). This layout wraps all your pages.

Paste the code before the closing body tag

In your layout file, paste the CTA button snippet just before the closing </body> tag. Astro will include it on every page that uses this layout.

    <!-- Your CTA button code goes here -->
  </body>
</html>

Build and verify

Run npm run dev to start your Astro dev server. Check any page — the floating CTA button should appear without adding any JavaScript to your bundle.

Best Practices for Astro

Add the snippet to your BaseLayout.astro component so it appears on every page that uses that layout.
Since Astro supports multiple UI frameworks, you don't need to convert the HTML to JSX or any other format — paste it directly into the .astro file.
Use Astro's built-in scoped styles by placing the CSS in a <style> tag within the layout component.
If you have multiple layouts (e.g., blog layout, docs layout), create a shared CtaButton.astro component and import it into each.

Ready to build your button?

Design it visually, export clean code, and paste it into your site.

Open the Generator

Frequently Asked Questions

Does the CTA button add JavaScript to my Astro site?

No. The output is pure HTML + CSS, matching Astro's zero-JS-by-default philosophy. Your site stays fast.

Can I use it on individual pages instead of site-wide?

Yes. Instead of the base layout, paste the code into specific .astro page files where you want the button.

Does the button work with Astro's view transitions?

Yes. If you place the button in the layout, it persists across view transitions. For the best experience, add the transition:persist directive to the button element.

Can I use this with Astro's content collections?

Yes. Content collections determine page content, but the CTA button lives in the layout layer. It appears on all collection pages that use the layout containing the button.

How to Add a CTA Button to Astro