Try it now, no sign-up
How many months does a pregnancy last?
Wrong answer, try again.
An online gender reveal is a locked link instead of a balloon or a cake. You hide 'It's a boy' or 'It's a girl' behind a small lock, share one link with everyone near or far, and they crack the code to find out. Free, no app, and everyone can open it at the same moment.
Write 'It's a girl' or 'It's a boy', or hide a photo or a video link, and choose an easy question.
Share the link or the QR code with everyone, including family who cannot be there in person.
They crack the code at the agreed moment and the result appears on every phone at once.
Designed down to the last detail
Nothing on the screen is fixed. Pick a theme, choose a filmed object that fidgets while the lock holds and opens on video, with sound, when the code is right, then a celebration for the moment it opens. Set the typeface and size, and end on your own reveal. Your players see exactly the screen you designed.
Everything you can design on a lock →51 themes, and more in the builder. Each one paints the lock, its keys and its button.
45 filmed objects that fidget while the lock holds and open on video, with sound, when the lock gives way.
37 typefaces and 6 text sizes, from a phone in hand to a screen across the room.
Or your own two pictures
Upload a closed and an open picture: the parcel as wrapped, then what was inside. Included with the Event Pass and Pro.
Every theme, every filmed animation, your own pictures, the celebrations, typefaces and text sizes come with the Event Pass or Pro. A basic lock keeps the default theme.
This is the lock in the demo above, set up for a family spread across two countries. Copy it as is, or change the question.
Family abroad? Everyone opens the same locked link at an agreed time and finds out together.
Use the colours lock: they enter a sequence of colours, and the reveal says pink or blue.
Let guests vote boy or girl first, then send the locked link that settles it.
Hide a photo of you holding pink or blue balloons as the reveal instead of plain text.
Show the QR code on the TV at the party. Every guest scans and cracks it at the same time.
Let the big brother or sister crack a one-digit lock in front of everyone.
Free, with unlimited attempts for the whole family. The Event Pass, paid once for one event, removes the Lock Challenge branding from the reveal.
Build everything first, paid options included. You only choose a plan when you publish. Start building →
Free
Event Pass
Pro
39 ready-made templates, the 6 timed ones Pro alone +19 more →
Every plan: 15 lock formats, unlimited players and attempts, QR code and short link.
An online gender reveal is a locked web page that says boy or girl. The result sits behind a small lock; you share one link, and each guest cracks the code on their own phone to find out. It replaces, or adds to, a balloon or cake reveal for people who cannot be in the room. See creative gender reveal ideas.
Create a free lock, type 'It's a girl' or 'It's a boy' as the reveal, pick an easy question, and publish, with a photo behind the lock if you like. You get a link and a QR code. Send the link to everyone with a time to open it, and they crack the code together.
Yes. That is the point. Anyone with the link can crack the code from anywhere, at the same moment as the people in the room.
Yes, on every plan, free included: a photo, video and audio, and several items in one reveal, as well as text with bold, sizes and links.
No. They open the link in any browser, with no app and no account.
You see how many people opened the link and how many cracked the lock. Pro adds timings and a CSV export.
One locked link brings everyone into the same moment, near or far. Create your gender reveal free.
Create your gender reveal →
