Send a message
that waits for them.

Write something. Lock it for 1 to 72 hours. They can't open it until the countdown ends.

Perfect for the 3am message you don't want them to read until morning. For the apology that needs a night to land. For long distance.

No accounts. No servers. Nothing saved.
The message lives only in the link you share.
What Sealed is

A message that your partner can't open yet.

Sealed is a free, browser-based tool for sending a time-locked message. You write the words. You pick a wait time — anywhere from one hour to seventy-two. You share the link. The person on the other end sees the envelope arrive, but they can't open it until the countdown ends.

The point isn't the trick. It's what the waiting does. A text takes five seconds to read and five seconds to forget. A message you have to wait twelve hours for has already mattered by the time it opens — you've thought about it, looked at the envelope, imagined what might be inside. Delay turns a message into an event.

No account, no download, no server-stored content. The words live inside the link itself. When the timer ends, the envelope reveals. Until then, it's just a small, patient promise sitting on their screen.

When to reach for it

Eight evenings Sealed was built for.

A text is the right tool most of the time. These are the moments where a text isn't quite enough — where you want the message to arrive a little more slowly, with a little more weight.

The long-distance goodnight

Different time zones. You're going to bed as they're starting their day. Seal a message for the hour they wake up — they open it with coffee, not with the rest of the timeline.

The morning-of surprise

Anniversary tomorrow. Birthday in forty-eight hours. Proposal next week. A Sealed message turns "I was thinking of you earlier" into something they open at exactly the right moment.

The trip send-off

They're flying somewhere. Seal a message for the hour their flight lands. It's waiting for them when they turn their phone back on — a small tether to home.

The apology you want to land right

Some things shouldn't be dashed off in a chat window. Writing them, then leaving them to sit for a few hours before the other person sees them, makes the words heavier — in the good way.

The "open this when" letter

Open this when you get the job. Open this when the results come in. Open this on our first anniversary. Sealed makes a letter that waits for the right moment without you having to remember to send it.

The flirt that arrives later

Short timer, late afternoon, end-of-workday. Something small and warm that lands in their evening. Not urgent — just a signal across the day.

The thank-you that wasn't said

They did something kind last month and you never quite thanked them the way you meant to. A written note, sealed for a few hours so you can't chicken out, lands tonight instead.

The future-self letter

Seal a message to yourself — about what's happening now, what you hope for, what you're afraid of. Open it in seventy-two hours and see what shifted. A quiet, private use of the tool.

How it works

Three steps. About a minute.

01

Write it

Type the message. Up to 400 characters — a line, a paragraph, a short letter. No template, just a blank page. The limit is deliberate: Sealed is for the thing you'd actually want held, not a long document.

02

Set the timer

Pick any wait time between one and seventy-two hours. The countdown starts the moment you seal it. You can't change it afterward.

03

Share the link

Send the link however you want — text, email, a note tucked somewhere. The envelope arrives immediately. The message doesn't reveal until the timer ends.

Why delay matters

The small weight of a message you can't open yet.

Messages used to take time. A letter left a hand, traveled, arrived days later, was held in a different hand and read with different light. The gap between "sent" and "read" was where most of the feeling lived — the anticipation, the imagined reading, the waiting.

Modern messages have collapsed that gap. A text is instantaneous and disposable. Which is fine for logistics — and a quiet loss for the things logistics can't carry. Sealed puts a small amount of that gap back. A message with a twenty-four hour lock isn't a piece of content; it's a small event you're both part of, on different sides of time. (For couples in long distance, where waiting is already half the relationship, we collected 35 specific ideas that actually work for LDR from someone who spent two years in one.)

The other thing Sealed does, quietly, is make you a better writer. When you know your partner will have to wait to read this, the bar goes up a notch. You slow down. You pick the word that actually means the thing. The gap isn't just for them — it's for you, too.

If the apology you're writing at 3am is tied to a fight that went somewhere physiological — where both of you stopped being able to hear each other — read our piece on emotional flooding, the nervous-system reason most mid-argument conversations stop working. Sealed exists partly for what to do after that moment.

Pairs well with

Sealed is the asynchronous half of what Unravel makes. For an evening together — questions, prompts, slow conversation on the couch — try Heart to Heart or Truth or Dare.

Questions

Before you seal one.

Is Sealed really free?

Yes. Completely free, in-browser, no account, no download. The full 1–72 hour range is available on the free version — there's no paid tier.

How does Sealed keep a message private?

The message is encoded into the link itself rather than stored on our servers. Only someone with the exact link can open it, and only after the countdown ends. If the link is deleted before it's opened, the message is gone — we have no copy.

Can I cancel or edit a Sealed message after I send it?

No. Once the link is shared, the message is sealed. You can't edit it and you can't pull it back. This is intentional — the inability to take it back is part of why the message carries weight. Write it as though you mean it, because you do.

What happens if my partner loses the link?

The message goes with it. We don't store it anywhere else. If the link is still in your sent text or email, re-share it; otherwise, write another one.

Does the recipient need to sign up or download anything?

No. They just open the link in a browser. The envelope appears immediately; the message reveals when the timer ends. Works on phone, tablet, or laptop.

How long can a Sealed message stay locked?

Up to 72 hours. The minimum is 1 hour. Most couples pick somewhere between 4 and 24 hours — enough wait to make it feel like an event, not so long that they forget about it.

What's a good wait time to pick?

Short (1–4 hours) for same-day surprises — "open this after work." Medium (12–24 hours) for "open this tomorrow morning." Long (48–72 hours) for anniversaries, a specific arrival time, or a weekend trip. If you're not sure, 12 hours is a good default.

Can I use Sealed for a marriage proposal?

Yes, and many people do. Sealed makes a nice digital companion to a physical ring moment — a message that opens at an exact time, on an exact day, that they'll have forever (screenshot-able). Use a longer timer so they have to wait for it.

Can I send a Sealed message long-distance?

Yes — long-distance is one of Sealed's most common use cases. Different time zones actually make the countdown feel more natural: you seal it at bedtime, they wake up to it.

Can I use Sealed for something that isn't romantic?

Sure. People use it for letters to a future self, messages to a friend before a big move, open-this-when notes for a kid's birthday. Anything you'd want to write now and deliver later works.

Does Sealed work on mobile?

Yes. The whole thing runs in the browser on phone, tablet, and desktop. Nothing to install.

Is there a limit to how long the message can be?

Yes — 400 characters. Enough for a paragraph, a short letter, a few lines written with care. Long enough to say the thing, short enough to force you to pick the words. Sealed is for the message that actually matters, not for a long document — the cap keeps it that way.

Write the thing. Lock it for a while.

A minute to seal. Hours or days of quiet anticipation. One small event, waiting on their screen.

Start a new Sealed message ↑