Icon representing Send 21st birthday cards online

Send 21st birthday cards online

  • Stylish 21st birthday e-card filled with messages, GIFs, photos & videos.
  • Themed birthday backgrounds or add your own.
  • Add a collection for a present in one click.

Get started in 1 minute. Pay only when you're ready to send.

Sample message image for message from Graeme

Happy Birthday Amanda! Hope you drink lots of bubbles, eat lots of cake, and party hard! Have a great day x

Graeme

Sample message image for message from Grace

Happy birthday Mandy. I hope the family spoils you and you have a fab day x

Grace

Sample message image for message from Brian

Happy Birthday Amanda! Hope all your birthday wishes come true on this special day. Or at least one of them. ❤️??

Brian

Sample message image for message from Leanna

Go Amanda!!! Enjoy yourself and crown a great day with a cocktail you crazy lady! ?

Leanna

How Thankbox Works

Create step image

Create

Start your Thankbox in 1 minute. Personalise it with over 150 custom backgrounds and icons to choose from. Add an optional gift collection.

Share step image

Share

Invite your group to add their messages with a simple link. Everyone can customise their message with fonts, photos, videos & GIFs.

Send step image

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.

How it works

 It made arranging special occasions at work so much easier  

— Nadine

Example gift card options we offer

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
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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
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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

Amazon logo
HSBC logo
Unilever logo
Ubisoft logo
Sony logo
Booking.com logo
Johnson & Johnson logo
Deloitte logo
Canon logo

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

Birthday cake emoji

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.

Paint palette emoji

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.

Gift emoji

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 Thankbox now!

Try it now

Create your Thankbox in seconds - no need to register. Only pay when you're ready to send it.