Embed widgets

The embed widget lets attendees register for your event without leaving your own website. Mercleo Events generates a ready-to-paste code snippet — either a plain <iframe> or a JavaScript loader — that you drop into any page, CMS, or site builder.

Where to find the snippet

Open any published event and go to Settings (/{slug}?tab=settings). Scroll to the Embed section. The embed URL and both code snippets are generated automatically — there is nothing to configure before they appear.

iframe vs JavaScript loader

Mercleo Events provides two snippet formats. Use the one that fits your site's constraints:

• iframe HTML — A self-contained <iframe> tag. Works in any HTML page, Webflow, Squarespace, or custom embed block. Fixed height; does not resize automatically to match registration form length.
• JavaScript loader — A <script> tag that injects the iframe at a named target element. Use this when your CMS strips raw <iframe> tags, or when you want to control placement via a div in your template.

Customizing the heading

A Show heading above iframe toggle controls whether the copied snippet includes an <h2> above the iframe. It is on by default, with the heading text pre-filled as Register. You can replace that text before copying.

Embed URL uses event ID, not slug

The embed URL shown in the panel uses your event's UUID — for example, /embed/a1b2c3d4-... — not the event slug. This means the embed URL remains valid even if you rename the event or change its slug.

Direct links to /e/{slug}/register (the full microsite registration page) are slug-based and would need updating after a slug change. The embed widget does not have this problem.

Domain restrictions

There is no domain allowlist in the current version of embed widgets. Any site can embed your registration form using the snippet.