Send 21st birthday cards online

Create a stylish 21st birthday e-card filled with messages, GIFs, photos & videos.
Choose from 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.

Create a Thankbox View example

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

Graeme

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

Grace

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

Brian

Go Amanda!!! Enjoy yourself and crown a great day with a cocktail you fab girl! You know I'll be there, too 😘

Leanna

How Thankbox Works

Create

Start your Thankbox in 1 minute. Personalise it with over 100 custom backgrounds and icons to choose from. Add an optional gift collection.

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.

How it works

Loved my Thankbox! Something I can easily look back at in years to come.

— Charles

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 700 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, via Treepoints.
To date we've planted enough trees to fill over 170 tennis courts. Ace.

trees planted

Bringing joy to thousands of organisations, including

The easier 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 much 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!

Frequently Asked Questions

We provide more answers on our support page, so check that too if you can't find what you are looking for here.

What to write in a virtual birthday card?

A Thankbox online birthday card allows contributors unlimited words and the ability to add a photo, GIF or video to a message. This can present a challenge to know what to write. There are no customs or norms for an online card like there are with a traditional group birthday card.

To help those requiring some inspiration or guidance here are a few practical tips:

Your Thankbox will no doubt have ‘Happy birthday’ in the title. So personal messages can highlight what you want to say and in your own personal style.
Mention why you appreciate the celebrating person.. Depending on who it is and your relationship, you may want to show some extra heart here.
Include something relevant to the occasion (e.g., how the past year has gone or positive wishes for the future). In other words, focus a message around the milestone of reaching a new year.
Consider including a funny or witty message toward the end.
Sign off with a final message (e.g., All the best, With love, etc.) and your name.

Whether you include all the above will depend on the card. Sometimes it makes sense to keep a birthday card short and sweet, while you’ll want to elaborate in other cases. What follows are some general occasion specific tips:

Funny birthday card

Want to write something funny on a birthday card? Go ahead. Birthdays are a celebration! It only makes sense to keep things light-hearted and fun. Be considerate to others though. For example, if it’s your best friend since childhood then wind in any profanities or embarrassing memories if their Gran is signing too!

Birthday messages for professional relations

Wondering what to include in a birthday card for colleagues? Obviously, you want to keep it professional but not too serious, either. Consider how long you’ve known the person, how well and how closely you may have worked together.

Birthday messages for a child

If you’re used to writing cards for adults, you should keep a birthday card for a kid short, sweet, and fun. Kids love silly - so GIFs are an ideal complement to your words.

Milestone birthday messages

A Thankbox is ideal for any birthday. For those special birthdays - coming of age, landmark decades - a Thankbox ecard is perfect. With everyone able to contribute it provides a wonderful keepsake forever.

If you want more ideas or inspiration check out our blog about what to write in a birthday card.

What are the benefits of an online birthday card?

A traditional birthday card from one person to another is an intimate, personal thing. For that purpose a paper card is ideal.

But what if a group of people want to send a birthday card? How easy is it for everyone to contribute? Groups may be one or some of the following:

The team at work
The extended family living around the world
Friends from the sports, hobby or interest group club
Fellow volunteers
The Church group

For all groups, digital, online cards come into their own for celebrating someone’s birthday. These advantages include:

Inclusion - everyone, anywhere in the world can add their birthday card message. All it needs is an internet connection. With nobody excluded the birthday card is so much more meaningful and valued.
Time saving - click, create, share, customise, send. It takes seconds to invite people to add messages and contribute to the collection. A virtual birthday card saves a huge amount of time. Time that can be better spent.
No limit on contributions - there is no limit to the number of contributors or the length of their messages. No cramming tiny writing into what’s left of the space in a card. The Sir David Attenborough birthday public Thankbox is a great example. Thousands of people signed and shared their love and appreciation.
100% creative - a Thankbox features photos, GIFs and videos, different fonts and emojis. There is no restriction on anyone’s creativity. That means more laughs and smiles for the birthday boy or girl.
Flexibility - messages can be edited right up to the last second before sending. Collection pot contributions topped up too.
A forever memento - a Thankbox is forever. The unique link will always be live for the recipient. No stashing of paper cards in a box, or popped into the recycling.
Great value for money - one payment opens up a world of possibilities and creativity for online group cards. No sending fees, no extra costs.
Collection included - with a Thankbox a collection for a birthday gift card comes as standard.
Environmentally kind - a Thankbox is good for the planet. No emissions. 100% renewable electricity. No offices, no delivery or commute miles. No paper means no wasted energy, water, or chemical disposal. And we plant trees. One for every 10 Thankboxes sold.

Traditional paper cards still have a role in celebrating, congratulating and appreciating individuals. However, they are more suited to one-to-one communication and a private expression of thoughts and feelings.

Can I organise a collection for a birthday present?

You certainly can.

Every Thankbox has an optional collection included as standard. When you create the Thankbox click the ‘Add a gift card collection’ button and you’re all set.

Everyone invited to leave a message can add to the collection pot at the same time. Saves everyone time and hassle.

Bear in mind not all online group card services provide a collection service. And the majority of online collection pot services don't include a group or virtual greeting card.

How easy is it to customise and manage my Thankbox?

Thankbox is designed from a customer viewpoint. So making changes, upgrading and managing a Thankbox is super easy - anytime right up to the point of sending.

From your dashboard as the organiser you can:

Customise your Thankbox - backgrounds, titles, icons. Upgrading to Premium allows more customisation. Video in messages; raised gift collection ceiling; handcrafted backgrounds and a host of user uploaded customisations.
Change the Thankbox send date.
Decide who sees the collected amount.
Create reminders. To either set up a Thankbox and for specific annual events.
See what all those fab messages look like as the recipient.
Copy and share the Thankbox sharing link.

Contributors to a Thankbox can:

Change their message
Change any GIF, photo or video (if Premium)
Change their choice of font
Add to collection contributions

And throughout the life of a Thankbox everyone is kept informed of progress all along.

Is my Thankbox secure and private?

Completely.

Only people with the sharing link can access a Thankbox and only to leave a message. Thankbox links are not visible to search engines.

Thankbox servers and software are secure and compliant with best practice security protocols. Online payment systems are compliant with regulatory standards.

Thankbox never shares any customer data collected with any external organisation. We've partnered with the best payment processing service to ensure maximum security of payment card details

Try it now

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

Create a Thankbox