> For the complete documentation index, see [llms.txt](https://piny.gitbook.io/doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://piny.gitbook.io/doc/readme.md).

# Overview

Piny is a simple idea:

> You place a digital pin on the world map, attach your memory or message to it, and keep it forever on the blockchain.

Maybe it’s the street you grew up on, the café where you met someone special, or the city where everything changed for you. You choose a location, write what it means, add an image if you like, and mint it as a marker that only you could have created.

You can do this just for yourself — to build a personal map of your life — or together with others:

* Everyone pinning support for a contestant from their own hometown.
* People around the world marking a protest or speaking out against something they care about.
* Fans covering a stadium’s coordinates with markers after a big match.
* Friends who grew up in the same neighborhood, each pinning a memory on the streets they shared as kids.
* Donors pinning their contribution on the map during a global charity campaign, so support becomes something you can literally see.

These are just a few examples — what people do on Piny is limited only by their imagination.

Piny turns all of these into a visible memory layer on top of the world: personal, emotional, and hard to erase.

## What is Piny?

Piny is a world map built on Web3, where your pins are not just points on a screen, but digital objects you truly own.

On Piny you can:

* **Drop personal markers** on the world map with images, messages, and coordinates.
* **Create or join shared spaces (events)** around a theme — a charity campaign, a fan community, a remembrance, a movement, or anything people care about.
* **Mint markers as NFTs**, so your pins become permanent, ownable collectibles in your wallet.
* **Discover, collect, and trade markers** in a built‑in marketplace with others who care about the same places and stories.

To keep every marker clear and meaningful, Piny uses a few simple limits:

* Marker images are shown at **336×336 pixels**, so visuals stay sharp and consistent on the map.
* Marker names are limited to **128 characters**, enough to say something real without turning into a wall of text.
* Marker messages are limited to **1024 characters**, giving you space to tell the story while still encouraging you to keep it focused.

These limits aren’t there to restrict you, but to help every pin feel intentional, easy to read, and respectful of other people’s time.

Piny is also not tied to a single chain. It runs across **Avalanche, Polygon, BNB Smart Chain, and Arbitrum**, and can expand to more networks over time. Your markers live on open, widely used blockchain infrastructure — and Piny can grow wherever the community goes next.

Minting markers directly on‑chain and paying a small fee helps keep Piny meaningful. It’s enough to make every pin a real choice, not throwaway noise, so the map reflects stories people truly care about.

That same fee also helps fund the development and maintenance of Piny itself. There’s no hidden “sell your data” business model here — no targeted ads following you, no trading your personal information in the background. The platform is supported by the value people see in their own markers, not by exploiting their attention or their data.

## Who is it for?

Piny is for anyone who wants to leave something on the map:

* **Individuals** who want to turn their life moments into a personal world map.
* **Communities & DAOs** who want on‑chain proof of participation around a cause or idea.
* **Fan groups & creators** who want to gather their audience around locations, stories, or milestones.
* **Projects & campaigns** that want to show support, donations, or awareness in a way people can literally see on a map.
* **Explorers** who enjoy discovering the stories other people left behind.

If you can use an online map and upload a photo, you can use Piny.

## How the app is delivered

* The **smart contracts** handle events, markers, minting, and the marketplace.
* The **web dApp** gives you a friendly interface to explore, create, and collect — using familiar wallets like MetaMask and WalletConnect.

You don’t have to understand how the blockchain works underneath. You just pick a spot on the map, say what it means to you, and let Piny keep it alive.