Celebrate her special day with a digital card packed with messages, photos and videos from the whole family. It is the easiest way to show your sister how much she is loved, no matter where everyone is located.
The Perfect Online Birthday Card for Your Sister
Choose a Birthday Card Design for Your Sister
How to Create a Birthday Card for Your Sister
Create Your Sister's Card
Pick a fun design she will love and add your personal birthday message to start the celebration. Customizing the background and fonts takes just a few seconds.
Invite Family to Sign
Share the secure link with siblings, parents, and friends so they can add their own notes and photos. Everyone can contribute from their phone or computer without needing an account.
Send It to Your Sister
Schedule the card to arrive in her inbox right on her birthday or send it instantly. She can open her Thankbox and enjoy all the love in one beautiful digital package.
Try it now
Create your Thankbox in seconds - no need to register.
Only pay when you're ready to send it.