Hedera Contract Builder

The Hedera Contract Builder is a browser-based tool that simplifies the entire smart contract development lifecycle on Hedera. Developed by Kabila on behalf of Hashgraph, it allows developers to edit, compile, deploy, verify, and call Solidity smart contracts directly in their browser — no local setup or command-line tools required.

Why We Built It

Smart contract development on any blockchain typically requires a complex toolchain: Hardhat or Foundry configuration, Solidity compiler setup, deployment scripts, and verification workflows. The Contract Builder eliminates all of this complexity by providing a complete, browser-based IDE.

Key Features

• Rapid development — Go from idea to deployed contract on the Hedera testnet in seconds
• No setup required — Everything runs in the browser, no packages or configuration needed
• Built-in templates — Start quickly with pre-built templates for common standards:
  • ERC-20 (Fungible Tokens)
  • ERC-721 (NFTs)
  • ERC-1155 (Multi-Token)
  • Hedera Token Service (HTS) system contracts
• Complete workflow — Edit, compile, deploy, verify, and call contracts in one place
• Contract verification — Verify source code on HashScan
• Collaboration — Share contracts with team members and collaborators
• Open source — Fully open-source, encouraging community contributions

Who Is It For?

Web2 Developers Entering Web3

The Contract Builder is the perfect starting point if you're new to smart contracts. The intuitive interface and interactive templates let you learn Solidity and deploy your first contract with minimal prior knowledge.

Existing Hedera & Web3 Developers

For experienced developers, the Contract Builder is a productivity tool for rapid prototyping. Test new contract logic, explore Hedera's smart contract capabilities, or quickly verify contracts — all without leaving your browser.

Getting Started

1. Visit the Hedera Contract Builder
2. Select a contract standard or template (ERC-20, ERC-721, etc.)
3. Log into your Hedera Portal account
4. Edit the contract code to fit your needs
5. Compile, deploy, and verify — all from the browser

Developed & Maintained by Kabila

Hashgraph commissioned Kabila to design, develop, and maintain the Contract Builder as part of the official Hedera Developer Portal. As stated in the official Hedera documentation:

"Built in collaboration with Kabila, the Contract Builder is an open-source project, encouraging community contributions and transparency."

Kabila continues to evolve the tool with new features, contract templates, and improved developer workflows under its ongoing engagement with Hashgraph.