Quiet hatchery
No microphone. The browser didn’t let the tool use a microphone. Check for a microphone icon in the address bar, allow it, then press Start again. Until then, hold the button below to test the game.
Slide left for a stricter limit. Noise above the black line wobbles the egg and cools it down a little.
Some eggs hold something special: rare (1 in 5), ultra rare (1 in 12), mega rare (1 in 30) or insane (1 in 100). Any creature can also be shiny (1 in 25).
Class journal
Hatch log
Back up or move this journal
The journal is saved in this browser on this computer only. Copy the backup code and keep it somewhere safe, such as an email to yourself. Paste it here on any computer to bring the collection back.
The tool only measures how loud the room is. Nothing is recorded or sent anywhere, and the journal is saved on this device.
It hatched!
About quiet hatchery
Quiet hatchery is a free noise monitor game for the classroom. Press Start and the tool listens through your computer’s microphone. While the class stays under the noise limit the egg warms up and cracks. If it gets too loud, the egg wobbles and cools down a little. When it hatches, a new creature joins your class journal, and children can give it a name. Creatures come in five rarities, from common to insane (1 in 100 eggs), and any of them can be shiny. The tool only measures volume and never records anything. The journal is saved in your browser, and a backup code lets you move it to another computer.