Steps to Add a Full Screen Popup App on a Tumblr Site
Create your customized Full Screen Popup app, match your website's style and colors, and add Full Screen Popup to your Tumblr page, post, sidebar, footer, or wherever you like on your site.
How To Add a Full Screen Popup App on Tumblr:
Create a Free Full Screen Popup App
Start for free nowEdit Theme
Go to your Account Settings and click Edit Appearance. Then click Edit Theme.Edit HTML
Underneath Custom Theme, click Edit HTML.Copy and Paste 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.New Text Post
Back inside the Tumblr blog editor, add a new Text Element.Paste the Shortcode
Paste the shortcode into the post. Then save. If you expand the post, you will see your new POWR Full Screen Popup.Click the POWR Settings Icon to open the POWR Editor.Begin editing the following Full Screen Popup 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 Full Screen Popup plugin.
Not sure if our Full Screen Popup app is right for you? Find out more about its features and integrations.
See the detailsRemove the Guesswork of Building Your Brand
A Solid Brand Identity Starts on Your Website
If you have your Tumblr website working, you’ve tackled the biggest challenge in building an online presence. Way to go!
But next comes the hard part: how can you entice, captivate, turn, and support more visitors?


Now You Have To Make Your Elements Unique
People often ask a 'techie' friend to design a Full Screen Popup for them or hire a 'web guy' that one of their friends referred.
Others look overseas or for low-cost open source alternatives for Full Screen Popup.
Save Time With POWR
Plus, updating and customizing a Full Screen Popup app can be challenging, and you may think you have to hire a developer.
Additionally, as your business develops, hackers could see an unsecured Full Screen Popup as a great opportunity to exploit your business and your customers. We consider this and built safeguards!


POWR supports high-volume sites on Tumblr and prioritizes the security of our Full Screen Popup app, as well as all 60+ apps, to keep any bad actors at bay.

Our Full Screen Popup comes with a team of expert engineers that work constantly for you, making sure your Full Screen Popup is always working smoothly.
CASE STUDY: Rbia Shades wins big with POWR
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.

Yes, POWR has an app for that.
See apps in action
Trusted by the best in the biz!
POWR has helped over a half million businesses on every continent
(besides Antarctica, because of course not)
Frequently Asked Questions
Learn more about how to add POWR apps to your website.
Yes, any POWR app will work perfectly on any website. What’s better, is the patented POWR Live Editor is the same regardless of the app.
- Easily add more than one (for free)
- Edit to your needs directly from your live site
- Changes are made instantly
Absolutely! The POWR Full Screen Popup widget is optimized for mobile, ensuring that it looks great and functions smoothly across all devices, including phones and tablets.
This optimization enhances user experience, contributing to higher engagement rates on your Tumblr site.
POWR Full Screen Popup allows you to edit every detail such as fonts, colors, borders, and spacing directly from the editor, ensuring your Full Screen Popup perfectly match your brand's identity.
This flexibility makes it easy to integrate and align with your site's look and feel.
Adding Full Screen Popup to your Tumblr site is fully outlined above and straightforward with no coding required.
Simply follow POWR's setup guide, which is as easy as copy/pasting the provided code snippet into your site's HTML.
This ease of installation makes it convenient for Tumblr site owners to implement Full Screen Popup and gather feedback from their audience.
Using POWR Full Screen Popup on your Tumblr site offers numerous benefits, including enhanced customization options and easy installation without coding.
These features help improve your site's user engagement by allowing visitors to provide valuable feedback, leading to better online growth.


