---
title: "Easter egg"
description: "An Easter egg is a hidden surprise in software, a game or a website, triggered by a secret action. Learn its origins, examples and practical uses."
url: "https://nodea.io/en/glossary/easter-egg"
lang: "en"
updated: "2026-07-13"
---

# Easter egg

> An Easter egg is a surprise deliberately hidden in software, a game or a website — a joke, animation or secret feature — revealed by performing an unusual sequence of actions.

An **Easter egg** is a surprise deliberately hidden inside software, a video game, a film or a website — most often a joke, an animation, a secret mini-game or a wink to the user. The name echoes the tradition of hunting for hidden eggs: to uncover an Easter egg you usually have to perform an unusual, non-obvious sequence of actions, type a secret command or land on a special address.

## How an Easter egg works

The first widely recognised Easter egg is credited to the 1979 Atari game Adventure, whose programmer hid his own name in an otherwise unreachable room — a quiet signature at a time when publishers did not credit developers. Since then, Easter eggs have become a cultural tradition in the tech industry. In practice they fall into a few types:

- **In games** — hidden levels, characters, nods to other titles or famous input codes like the Konami Code.
- **In applications and systems** — animations triggered by clicking a hidden spot, or secret information screens.
- **On websites** — reactions fired by a keyboard shortcut or a console command, built in [JavaScript](https://nodea.io/en/glossary/javascript).
- **In search engines** — special effects that play when you type a specific phrase.

## Easter eggs in practice

On a [website](https://nodea.io/en/glossary/website), an Easter egg helps build rapport with the visitor: it surprises, entertains and reinforces the brand's image as creative and approachable. From a [UX](https://nodea.io/en/glossary/ux) standpoint it is a detail that rewards curiosity, yet it must never interfere with core tasks or hurt performance. Well designed, it stays invisible to the average visitor on the [frontend](https://nodea.io/en/glossary/frontend), and when discovered by a power user it becomes a delightful surprise worth sharing.

### How is an Easter egg different from a bug?

An Easter egg is a feature intentionally planned and hidden by the creator as a joke or curiosity. A bug is an unintended defect that makes the software behave incorrectly. The difference is intent: an Easter egg is deliberate, a bug is accidental.

## Related

- [Website](https://nodea.io/en/glossary/website)
- [JavaScript](https://nodea.io/en/glossary/javascript)
- [UX](https://nodea.io/en/glossary/ux)
- [Frontend](https://nodea.io/en/glossary/frontend)
- [Bug](https://nodea.io/en/glossary/bug)

---

Languages: [pl](https://nodea.pl/pl/slownik-pojec/easter-egg.md)  
Site index: [llms.txt](https://nodea.io/en/llms.txt)