Mark the Milestone
A sealed letter they open on your anniversary — more personal than a card, more meaningful than a gift.
Takes 2 minutes. Lasts forever.
Anniversaries deserve more than a generic card. With OpenWhen, you write a sealed letter protected by a question only your partner can answer — like "Where was our first date?" When they answer correctly, they break the wax seal and reveal your words. It's free, instant, and more personal than anything you could buy.
Start with a Template
Choose one and make it yours, or write from scratch.
Open On Our Anniversary
Another year. Another collection of moments I wouldn't trade for anything. The morning coffees. The late-night conversations. The way you laugh when ...
Open When You Want to Feel Loved
PROI don't say it enough. Life gets busy, days blur together, and the words that matter most get lost in the noise. So here it is, sealed and permanent:...
Open When You Miss Me
I know that feeling — the one where everything reminds you of us. A song, a smell, a quiet evening. So here's what I need you to know: right now, whe...
How It Works
Write
Compose your message or choose a template. Add a sticker, song, or photo.
Protect
Set a guardian question only your recipient can answer.
Share
Send the link. They break the wax seal to reveal your words.
Frequently Asked Questions
What is the best free anniversary gift?
A sealed Open When letter is one of the best free anniversary gifts. It's deeply personal, takes minutes to create, and delivers an interactive reveal experience your partner will remember. No account or payment required.
How do I write an anniversary Open When letter?
Visit openwhen.cards, choose the "Open On Our Anniversary" template or write your own, add a guardian question about your relationship, and share the link. Your partner breaks the wax seal to read your words.
Can I schedule an Open When letter for our anniversary?
You can create the letter anytime and share the link on your anniversary. The letter stays sealed until your partner answers the guardian question and breaks the wax seal.