Frequently asked questions

It's a free idle incremental game you play in your browser. You start with one sheet of paper, 0.1 mm thick, and fold it again and again. Every fold doubles the stack, so it soon towers past a giraffe, Mount Everest and the Moon, all the way to the edge of the observable universe. Every landmark you pass comes with a real fact.

Yes. The game is completely free to play in your browser, with no download and no sign-up. There's an optional Store for players who'd like to support the game, with extras such as paper styles, nameplates and gold. You never need to buy anything to play, and buying needs an account with an email address.

No. Open the game and start folding. A guest account is made for you automatically after your first fold, so your progress is saved without you doing anything. Adding an email is optional, and it's how you keep your progress if you clear your browser or change devices.

Yes. It plays on phones, tablets and computers in any modern browser, such as Chrome, Safari, Edge or Firefox. It was designed for phones first.

Yes. Your progress saves automatically in your browser, and a backup copy is saved to the cloud while you play, but as a guest that copy is tied to this browser: if you clear your browser data, it can't be recovered. Add your email in Settings (Save across devices) and your progress is kept safe, even if you clear your browser, lose your phone or switch to another device.

Yes. In Settings, choose Save across devices and add your email. We send you a 6-digit code to confirm it. Then use Sign in on any other phone, tablet or computer to keep folding from where you left off.

Yes. It's an idle game: your mills keep making paper while the game is closed (for up to 24 hours at a time), and a welcome-back card shows what you earned while you were gone.

The game is family-friendly and suitable for all ages. There's no chat, player names go through a word filter, and the only things other players see are your player name, its emoji and your scores on the leaderboard.

It's an origami challenge inside the game. Past the edge of the universe, you trace the crease patterns of real origami folds with your finger, from simple bases like the kite base to models like the paper crane and the paper dragon, and earn stars for accuracy and speed. Stars give powers that last forever, like more paper, stronger mills and more offline earnings. Unlocking a step uses creases, and some later steps also need Golden Thread.

Fold your sheet 102 times to reach the edge of the observable universe. Along the way you pass 38 real landmarks, from a coin and a house cat to Mount Everest, the Moon, the Sun, the nearest star and the Andromeda Galaxy. Some say there's more to find past the edge.

Tap the sky to make paper by hand. Then buy mills, starting with the Scrap Collector, which make paper for you automatically, even while you're away. Upgrades make everything faster.

Once you have enough paper for the next fold, pressure starts to build, and the game shows how big a boost the next fold will give. When to fold is up to you.

Unfolding starts a fresh climb. Your paper, mills, upgrades and folds start over, but you keep your creases, gold, cranes and gold perks. Every crease makes all your paper faster, forever.

You earn gold every time your stack passes a landmark, and triple the first time ever. Spend it in the Gold tab on permanent perks and paper colors that never reset.

Cranes count every fold you've ever made. Paper planes fly across the sky from time to time: tap them to catch them for a bonus, and look out for the golden ones.

Yes. The Ranks tab has live leaderboards for the highest fold, today's highest climb, the fastest run to the edge of the universe, cranes and paper planes. You get a unique name and player number, and you can rename yourself there.

Open Settings and set Graphics to Medium or Low (Battery saver). Medium keeps every animation with about half the sparkle; Low uses the fewest effects and runs smoothest on older phones. Auto, the default, lowers the effects by itself if the game runs slowly.

Yes. In Settings, Graphics has a Low option that works as a battery saver: fewer effects and about 30 frames a second, so it's easier on your phone's battery and smoother on older devices. Medium is in between, and Auto, the default, lowers the effects by itself when the game runs slowly.

The Grove is World 2. It opens once your stack reaches the edge of the observable universe. It's a forest where you hire a crew of woodcutters, haulers, planters and foragers, plant and fell trees, build lumber camps and fill paper mill orders. Your forest grows a ring every year, wild animals wander through it and rare finds turn up as you work. The Grove page on this site explains every part of it.

Reach the edge of the observable universe (fold 102). Then open the world map, with the map button at the top of the game or Settings → World map, and tap Go to the Grove. To come back, open the world map inside the Grove and tap Go to the Paper World.

Yes. Once you've visited the Grove, a green tree-globe called the Grove orbiter appears in World 1's sky. As your Grove grows and fills more mill orders, it makes your World 1 orbiters stronger. Tap it in World 1 to see your bonus.

No. Each world has its own save, and both are kept in the cloud with your account. World 1 waits where you left it while you're in the Grove.

Yes. Your crew keeps working and your trees keep growing for a while after you leave, and the Grove pays you for that time when you come back. The world map shows a gold ring around the Grove as that time fills up.

It's an idle game, so it keeps going on its own: your mills make paper while you focus on something else. Check in during a break, make a few choices, and come back later to see how far your stack has climbed.

It runs in any modern web browser, including on Chromebooks, with no download or install. Please follow your school's rules about when games are allowed.

Try folding a sheet of paper to the edge of the universe. The Great Paper Expansion is free, starts in seconds, and every fold takes you somewhere new, from Mount Everest to the Moon to distant galaxies, with a real fact at each stop.

Yes, if you enjoy idle and clicker games like Cookie Clicker, Universal Paperclips or Adventure Capitalist, you'll feel at home: tap, build, watch the numbers grow and start fresh for permanent boosts. The twist is that every number is a real distance, from a house cat to the edge of the observable universe.

You need an internet connection to open the game. Once it's open, it keeps playing if your connection drops: your progress keeps saving in your browser, and your cloud save catches up when you're back online.

It's a game first, but you learn as you play: every landmark comes with a real fact about how tall, far or big something is, and the folding itself shows how fast doubling (exponential growth) adds up. It's popular with curious kids and adults alike.

In real life the record is about 12 to 13 folds, using a very long, thin strip of paper. Each fold doubles the thickness, so it quickly becomes impossible. In the game you can keep going, and 42 folds would reach the Moon.

About 440,000 km (273,000 miles), which is further than the Moon, about 384,400 km away. A sheet of paper is about 0.1 mm thick, and each fold doubles it: 0.1 mm × 2⁴² ≈ 440,000 km.

102. After 102 folds a 0.1 mm sheet would be about 54 billion light-years thick, more than the 46.5 billion light-year distance to the edge of the observable universe.

In the game, open Settings and tap Feedback & bugs, or use the email on our Contact page. Tell us what happened and on which device, and we'll fix it.