Steps to Add a Before and after slider App on a Tumblr Site
Create your customized Before and after slider app, match your website's style and colors, and add Before and after slider to your Tumblr page, post, sidebar, footer, or wherever you like on your site.
How To Add a Before and after slider App on Tumblr:
Create a Free Before and after slider App
Start for free nowAppearance > Theme
In your Tumblr dashboard, open your Account Settings. Select Edit Appearance and click Edit Theme.Edit HTML
Click on the Edit HTML link underneath Custom Theme.Copy and Paste Script
Paste this script into the Tumblr HTML file. It's always best to paste it between the Head tags. Then click Update, and save.Create Text Post
Go back to the Tumblr dashboard and add a new Text post.Paste Shortcode
Paste the POWR shortcode into the text post, then save If you expand the post, you will see your new POWR Before and after slider.Click the POWR Settings Icon to open the POWR Editor.Begin editing the following Before and after 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 Before and after slider plugin.
All you need to know about our Before and after slider app is just a click away.
See the detailsRemove the Guesswork of Building Your Brand
A Solid Brand Identity Starts on Your Website
If you have your Tumblr website published, you’ve completed the biggest challenge in building an online presence. Way to go!
But next comes the hard part: how can you draw in, captivate, turn, and support more visitors?


Now You Have To Make Your Elements Unique
Some may first take a stab at to DIY a Before and after slider app or 'knows a guy' that can build one in 'no time'.
Others attempt to find open source Before and after slider apps, or companies abroad that allegedly offer Before and after slider apps for a bargain.
POWR Saves You Valuable Time
Also, customizing and updating a Before and after slider app involves even more time, and is likely to cause new issues.
As your company continues to progress, you're likely to face security issues, as hackers may attempt to take advantage of vulnerabilities in the Before and after slider app. POWR has you covered!


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

Furthermore, our team of incredible engineers work at all hours to keep POWR apps like your Tumblr Before and after slider functioning for you.
CASE STUDY: POWR put Rbia Shades on the success track
A few months after Rbia Shades launched at local fairs and craft shows, they were looking for a way to sell online.
They wanted to visually appeal to site visitors and demonstrate the quality of their product and lightweight, ergonomic designs.
Their web host did not provide an adequate solution for this, and after some research, decided to give POWR a try.
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.

All POWR apps are built for peak-performance.
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 Before and after slider 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 Before and after slider allows you to edit every detail such as fonts, colors, borders, and spacing directly from the editor, ensuring your Before and after slider perfectly match your brand's identity.
This flexibility makes it easy to integrate and align with your site's look and feel.
Adding Before and after slider 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 Before and after slider and gather feedback from their audience.
Using POWR Before and after slider 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.


