Send 21st birthday cards online
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Stylish 21st birthday e-card filled with messages, GIFs, photos & videos.
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Themed birthday backgrounds or add your own.
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Add a collection for a present in one click.
Get started in 1 minute. Pay only when you're ready to send.
How Thankbox Works
Create
Start your Thankbox in 1 minute. Personalise it with over 200 custom designs and icons to choose from. Add an optional gift collection.
Share
Invite your group to add their messages with a simple link. Everyone can customise their message with fonts, photos, videos & GIFs.
Send
Send when you're ready or schedule for later. The lucky recipient gets an e-card full of lovely messages that lasts forever. They can reply, download and share it.
Add a gift card collection in just one click
Securely collect cash from everyone when they add their messages. The card's recipient can choose a prepaid card or a gift card from over 1,000 popular retailers worldwide. Easy, flexible & rewarding!
How gift collections work
It's FREE to get started
Create your Thankbox and invite others to add their messages for free. Then it's just $5.99 to send or schedule your card. You can split the cost with everyone and pay from the collection pot. We think it's fair to share.
See pricing
Help care for our planet
We love planet Earth! By sending a Thankbox you are helping preserve it for future generations.
- No plastic or paper, and zero CO2 emissions.
- We plant a tree for every 10 Thankboxes sent.
Bringing joy to thousands of organisations, including
The easiest way to celebrate someone
Just because you’re not together doesn’t mean you can’t make someone feel special. Thankbox is perfect for any occasion when lots of lovely people want to celebrate one lucky person.
Celebrate being 21 today with an online 21st birthday card & collection
Happy 21st from your whole world
It's tricky for everyone to sign a group 21st birthday card. Not with a Thankbox. Create in seconds, invite anyone, anywhere to add messages and send. Easy. Unlimited messages and everyone invited, make a 21st happier.
21st birthday wishes your way
A birthday Thankbox is so much more than a simple ecard. Customise backgrounds, change fonts and icons. Messages shine with photos, videos and GIFs. 'Happy 21st birthday' is now 100% personal and memorable.
Collect for a special present
A birthday without a present is wrong. An optional collection pot comes as standard with a Thankbox. Add a message and chip in to the collection in one go. Less hassle, no time wasted. It's the icing on the 21st cake!
Try it now
Create your Thankbox in seconds - no need to register.
Only pay when you're ready to send it.