Steps to Add a Sign Up Form App on a Tumblr Site
Create your customized Sign Up Form app, match your website's style and colors, and add Sign Up Form to your Tumblr page, post, sidebar, footer, or wherever you like on your site.
How To Add a Sign Up Form App on Tumblr:
Create a Free Sign Up Form App
Start for free nowEdit 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.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.New Text Post
Go back to the Tumblr dashboard and add a new Text post.Paste the Shortcode
Paste this shortcode into the post and save. If you expand the post, you will see your new POWR Sign Up Form.Click the POWR Settings Icon to open the POWR Editor.Edit your Sign Up Form on Tumblr:
Go to the live Tumblr website and click the Settings Icon in the upper right corner of the Sign Up Form plugin.
Undecided if our Sign Up Form app will suit your needs? We have all the details you need.
See the detailsRemove the Guesswork of Building Your Brand
Establishing Brand Identity 101 - Your Website
If you have your Tumblr website working, you’ve tackled the biggest challenge in building an online presence. Awesome!
But next comes the hard part: how can you engage, captivate, turn, and support more visitors?


Now You Have To Make Your Elements Unique
Some may first try to DIY a Sign Up Form app or 'knows a guy' that can build one in 'no time'.
Others attempt to find open source Sign Up Form apps, or foreign companies that allegedly offer Sign Up Form apps for a bargain.
Save Time With POWR
Also, customizing these apps usually requires coding experience or another designer to help -- costing even more resources.
In a world where scammers infiltrate sites every day, many other Sign Up Form apps out there aren't built with security in mind, which could expose your customers or worse -- crash your whole site. Not with POWR!


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

Our Sign Up Form comes with a team of expert engineers that work constantly for you, making sure your Sign Up Form is always working smoothly.
CASE STUDY: POWR put Rbia Shades on the success track
After much success locally, Rbia needed a way to collect emails effectively on their brand-new website.
Their website provider did not have what they were looking for, so the search was on. After doing their research, they believed POWR was what they needed.
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.

POWR apps are made to grow your online revenue.
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 Sign Up Form 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 Sign Up Form allows you to edit every detail such as fonts, colors, borders, and spacing directly from the editor, ensuring your Sign Up Form perfectly match your brand's identity.
This flexibility makes it easy to integrate and align with your site's look and feel.
Adding Sign Up Form 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 Sign Up Form and gather feedback from their audience.
Using POWR Sign Up Form 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.


