A birthday card for a coworker, even one you barely know
Pick a picture, type your coworker's name, and drop the link in chat or email. Nobody signs up, nobody pays, and the letter is written to be safe for work.

What the card says inside
The message is the same for every coworker card. Only the name changes, so there is nothing to sign up for and nothing to store.

Dear their name,
Happy birthday from the other side of the desk, the video call, or wherever this finds you.
Work goes a lot better with people who answer messages, don't turn small things into big things, and make the dull parts of the week a little less dull. You're one of those people, and that counts for more than it usually gets credit for.
A few official recommendations for today. Take the long lunch. Leave anything that can wait until tomorrow for tomorrow. If someone books a meeting late in the afternoon, feel free to decline it on principle.
Here's to a year of reasonable deadlines and evenings where you actually log off on time.
Enjoy your day.
When you barely know them
Plenty of coworker birthdays land on people you've spoken to twice. That's fine. A short, friendly message is normal here, and nobody expects a paragraph about your deep bond. The letter on this card was written for this case as much as for close work friends: it's warm, a little dry, and makes no claims about shared history.
If you'd like to add something, a single line in your chat message works. "Happy birthday, hope it's a quiet one" is plenty from someone in another department.
When they're a real work friend
For the person you actually eat lunch with, the card handles the polite part and you can be more yourself in the message that goes with it. Reference the running joke about the printer, the project you survived together, or the snack drawer they keep stocked. Keep anything you wouldn't want forwarded out of a work channel; send it to their personal number instead if it's that kind of joke.
Sending it from the team
The letter works from one person or from a group because it never leans on "I". The easiest way to send it as a team is for one person to make the card and post the link in the team chat with a line like "From all of us", or message the birthday person directly and list the names.
This isn't a group-signing tool. There's one letter and no space for ten people to each write a note. If your team likes to collect individual messages, use a group card service for that and send this one when you just want something quick and decent-looking.
Office etiquette worth knowing
A few things trip people up with workplace birthdays, especially in larger or remote teams.
- Not everyone wants their birthday announced. If they've never mentioned it, message them privately instead of posting in a big channel.
- Leave age out of it, including the jokes. It's the most common way a friendly card goes sideways.
- Gifts are optional. If a group collects money, keep the amount small and make it clear that chipping in isn't required.
- For remote coworkers, check their time zone and send it during their morning.
- If your company has a birthday tradition, like a shared cake or a channel post, go along with that and use the card as an extra.
Desk, party or still life
The first picture is a sunny desk by a window with a cupcake and one candle, a latte and a small wrapped gift. It's calm and works for almost anyone. The second is an animated office party, coworkers in paper hats cheering around a cake full of candles, a good pick when the whole team is sending it. The third is an illustrated still life with a slice of cake, a coffee mug, a notebook and a monstera plant, the quietest of the three, good for a coworker who'd rather skip the fuss.
Questions people ask
What do you write in a birthday card for a coworker you don't know well?
Keep it short and friendly. Wish them a good day and, if you like, mention one thing about working with them. The letter on this card is written so it doesn't assume you're close, so you can send it to someone you've only met in meetings.
Is it okay to send a coworker birthday card over Slack or Teams?
Yes. The card is just a link, so it posts cleanly in Slack, Teams, Google Chat or email. If the person keeps their birthday low-key, send it in a direct message rather than a team channel.
Can several coworkers sign this card?
Not on the card itself. There's one fixed letter and no signature space. A team can still send it together: one person shares the link and lists everyone's names in the message.
Can a coworker's birthday card be funny?
Light humor is usually fine; the letter here has a bit of it. Avoid jokes about age, looks or personal life, and anything you wouldn't want someone else to read over their shoulder.
I missed my coworker's birthday. Is it too late to send something?
A day or two late is completely normal at work. Send the card with a short note that says you're a little behind. The card doesn't show a date, so it reads the same whenever it arrives.
Do coworkers need an app or account to open it?
No. They tap the link and it opens in their browser on a phone or laptop. No sign-up on either end.
Why can't I write my own message on the card?
Because we don't save anything you type. Whoever the coworker is, the letter doesn't change; the picture and the name are your only two choices, and that's what keeps the site free and account-free. Your own words can go in the Slack or Teams message you post the link with.