Testimonial widget for WordPress

Add a testimonial slider, carousel or wall to any WordPress page or post without installing a plugin.

Free to build. You need a free ReTestimonial account to get the code.

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This is the carousel layout. See all six layouts

Before you start

What WordPress asks for.

On a site you host yourself, you need to be an Administrator or an Editor. On a multisite network, only a Super Admin can do it. WordPress removes the script from the snippet when anyone else saves the page.
On WordPress.com, you need a paid plan with hosting features switched on. WordPress.com says installing any one plugin switches them on. Until then it removes the script, so paste the snippet again afterwards.

Add it to WordPress

Steps last checked on 3 October 2026.

1
Build your widget above, create the free account and copy the snippet.
2
Open the page or post in the editor.
3
Click the Block Inserter (+) where the widget should appear and add a Custom HTML block. Typing /html in a new paragraph does the same.
4
Click Edit HTML and paste the whole snippet into the HTML tab. The script line belongs there too, not under JavaScript.
5
Click Update, then save or publish the page as usual.

A testimonial carousel with three cards on a published WordPress page. — The widget on the test page, with sample testimonials.

What to expect

The editor shows an empty block where the widget will be. The widget appears on the page itself: use Preview, or open the published page.
The test site ran a caching plugin, and the widget still loaded for a visitor who was not logged in. If your plugin is set to hold scripts back until the visitor scrolls or taps, the widget will appear at that moment.

How these steps were checked

Tried on a live, self-hosted WordPress 7.1 site: the widget showed on the published page to a visitor who was not logged in. WordPress.com was not tried; what it requires is from its help pages.

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