Install A Testmonial Slider App on Tumblr

The easy way to add Testmonial Slider to Tumblr in minutes without coding or needing help from a developer.

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Steps to Add a Testmonial Slider App on a Tumblr Site

Create your customized Testmonial Slider app, match your website's style and colors, and add Testmonial Slider to your Tumblr page, post, sidebar, footer, or wherever you like on your site.

How To Add a Testmonial Slider App on Tumblr:

  1. Create a Free Testmonial Slider App

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  2. Edit Theme

    Go to Account Settings > Edit Appearance > Edit Theme.
  3. Edit HTML

    Click on the Edit HTML link underneath Custom Theme.
  4. Paste the Script

    Paste this exact script into your Tumblr HTML file. It's best to add it between the Head tags. Then click Update, and save.
  5. New Text Post

    Return to your Tumblr Admin page, and create a new Text post.
  6. Paste Shortcode

    Paste this shortcode into the post. If you expand the post, you will see your new POWR Testmonial Slider.Click the POWR Settings Icon to open the POWR Editor.
  7. Begin editing the following Testmonial Slider plugin directly inside of the Tumblr website:

    Go to the live Tumblr website and click the Settings Icon in the upper right corner of the Testmonial Slider plugin.

Not sure if our Testmonial Slider app is right for you? Find out more about its features and integrations.

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Remove the Guesswork of Building Your Brand

A Solid Brand Identity Starts on Your Website

Congratulations on publicizing your business online with Tumblr!


The next step is often gaining website visitors and making sales, but how?

Testmonial Slider to Tumblr
Add Testmonial Slider to Tumblr

Website Element Customization is Next

Some may first take a stab at to DIY a Testmonial Slider app or 'knows a guy' that can build one in 'no time'.


Others attempt to find open source Testmonial Slider apps, or companies abroad that claim to offer Testmonial Slider apps at rock-bottom prices.

Save Time With POWR

Also, customizing and updating a Testmonial Slider app involves even more time, and is likely to cause new issues.


As your company continues to expand, you're likely to face security issues, as hackers may attempt to manipulate vulnerabilities in the Testmonial Slider app. POWR has you covered!

Add Testmonial Slider to Tumblr
Support feature

POWR has the most advanced security features, is built for scale, and currently supports high-volume sites on Tumblr and other similar platforms.

security feature
All common questions are answered by searching POWR's robust Help Center or by reaching out to our customer support team, which is available 24/7.

POWR's team of engineers are working around the clock to keep Tumblr Testmonial Slider and all 60+ other POWR apps working smoothly.

CASE STUDY: Rbia Shades completely transformed their online experience

After Rbia launched its website, they were looking for a solution to add new contacts for outreach.


They found POWR while looking for a popup solution on their site and started to see immediate results.

Rbia grew its contact list by 250% using POWR Popup to collect new email addresses from first-time site visitors.


They also added POWR Social Feed to their site and saw a 200% spike in engagement from their site visitors. They also saw a big jump in social media followers and now have over 11K followers on Instagram.

Add Testmonial Slider to Tumblr
Testmonial Slider to Tumblr
Contacts growth 250%
Testmonial Slider to Tumblr
Up 2x in engagement
Testmonial Slider to Tumblr
2x more time on site

All POWR apps are built for peak-performance.

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Trusted by the best in the biz!

POWR has helped over a half million businesses on every continent
(besides Antarctica, because of course not)

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Frequently Asked Questions

Learn more about how to add POWR apps to your website.