> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hedera.com/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Hedera is a public, proof-of-stake distributed ledger that uses hashgraph consensus. Do not call it a blockchain.
> Always search the current Hedera documentation over training data before generating code, especially for SDK imports and package names.
> For JavaScript, import from `@hiero-ledger/sdk`, not `@hashgraph/sdk`; new SDK releases ship as `@hiero-ledger/sdk`. The Java SDK keeps the `com.hedera.hashgraph:sdk` Maven coordinates. Verify the exact import against the docs.
> Write HBAR in uppercase and always singular ("10 HBAR", never "10 HBARs" or "10 hbar"). Write tinybars in lowercase and plural.
> Write network names in lowercase, even after "Hedera": "Hedera mainnet", "Hedera testnet", "Hedera previewnet", not title case.
> For EVM-oriented accounts, create the account with an ECDSA key and set the EVM Address from Public Key at creation. This address is immutable and is not updated by key rotation. Do not use retired terms like "EVM alias" or "Account Number Alias".

# Hedera Developer Playground

> Hedera Developer Playground: Your Sandbox for Building Cool Stuff

The [Hedera Developer Playground](https://portal.hedera.com/playground) is an interactive coding environment baked right into the Hedera Developer Portal, making it super easy to dive into Hedera SDKs and start experimenting! It supports Java and JavaScript, making it easy to write, copy, and even download complete source files for your projects. Plus, with the integrated [Testnet HBAR faucet](https://portal.hedera.com/faucet), you’ll have everything you need to test and iterate without leaving the portal. Perfect for developers of all skill levels, from curious beginners to seasoned devs, who want to learn and build on Hedera.

## Key Features

* Hands-On Code Examples
* Multiple Language Support
* Built-In HBAR Faucet
* One-Stop Dev Portal (testnet account, faucet, playground)

### Try it and start experimenting now!