Testimonials on Notion, without a script tag

First the fact, so nothing downstream surprises you. Notion’s embed help says to paste “the embed URL provided by the content’s source. For example, this should start with https not <iframe” — a field that rejects an iframe tag has no path for a script tag. Pasting the tag into a Notion code block just displays it as text. There is no setting, on any plan, that changes this.

Route one: a Notion-site builder that places custom code. Super renders your Notion content as its own website, and loads the HTML from specially marked code blocks exactly where they sit — which is what this widget needs, because it draws itself at the spot its tag occupies:

1. In Notion, type /code to make a code block where the testimonials belong.
2. Put super-embed: on its first line, and the script tag on the line below.
3. Refresh the page in Super. The widget renders where the block sits.

Skip Super’s site-wide Head and Body code boxes for this. The widget renders at the exact spot its tag sits, so a tag filed into the page’s head has no visible spot to render at — the code block, placed where the section belongs, is the whole install.

Route two: an embed block showing a page you host. If any page you control already runs the tag — your main site, most likely — Notion will frame it: hover a new line, click +, choose Embed, paste that page’s URL, and drag the black bars to size it. Be clear-eyed about what this is: the widget runs on your page inside an iframe on the Notion page, in a fixed rectangle you size by hand. It works, and it is the only route that costs nothing — but it is showing the widget through Notion, not installing it on Notion.

On the Notion side there is nothing to buy. The docs for published Notion Sites enumerate everything a site can customize — share preview, theme, favicon, header, SEO title and description, and Google Analytics via a measurement-ID field — and custom code is not in the list on any plan. Even the paid extras point elsewhere: a custom domain is a separate add-on, and the “Built with Notion” watermark only turns off on one. Neither buys script execution.

The gate that exists is Super’s. Custom code appears on Super’s Personal Site plan at $16/month and up; the free plan hosts a site but carries no code features, and the super-embed: mechanism is likewise “a native feature of paid plans”, in Super’s words. Super is not the only Notion-site builder — if you use another, look for its convention for placing custom HTML inside a page.

You pasted the tag into a Notion code block and the page shows the code as text.

That block displays code; it never executes it. Nothing is misconfigured, and no retry will change the outcome — on plain Notion this route does not exist. Use one of the two routes above.

The embed block says Failed to Load.

Notion documents it: “Some websites prohibit their content from being embedded elsewhere. If you receive a Failed to Load error, that’s why.” The page you point the embed at must allow being framed — if it is your own page, check it for frame-blocking headers before blaming Notion.

A super-embed block prints as text, or nothing renders on the Super site.

Three checks: the Super plan (code features are paid — a free site skips the block entirely), the block’s first line (exactly super-embed:, tag on the next line), and a refresh of the page in Super after editing in Notion. Keep the tag in the block — Super’s generic advice to move misbehaving scripts into head code does not fit a widget that renders where its tag sits.

The embedded widget is cut off at the bottom.

A Notion embed is a fixed rectangle you resize by hand — “drag the black bars that appear on the sides” — and it does not grow when new testimonials are approved. Re-drag it after the set grows, or pick a widget design with a fixed footprint, like a carousel or a single quote, and never think about it again.