Tenderly Sandbox

Tenderly Sandbox is a browser-based development environment designed to simplify and accelerate Solidity smart contract prototyping and testing. It provides an integrated interface with Solidity and JavaScript editors, allowing developers to write, compile, and execute smart contracts without any local setup. The Sandbox creates a temporary Ethereum fork with pre-funded accounts for each session, enabling instant transaction simulation and debugging. This environment is especially useful for beginners, educators, and developers who want to quickly iterate on smart contract logic.

The Sandbox integrates tightly with the broader Tenderly platform, enabling seamless transition from prototyping to advanced debugging and monitoring. Developers can inspect transaction traces, state changes, and gas usage directly from the Sandbox interface or by loading transactions into the Tenderly Dashboard. It supports dynamic imports of external Solidity contracts from npm packages, and includes built-in support for popular JavaScript libraries like Ethers.js and Web3.js to interact with contracts programmatically.

What sets Tenderly Sandbox apart is its zero-install, shareable, and embeddable nature. Each Sandbox has a unique URL that can be shared or embedded in websites and tutorials, making it a practical tool for collaboration and education. Users can customize their environment by selecting network forks, block numbers, compiler versions, and optimization settings. The platform also offers advanced examples such as AAVE flashloan integration and BAYC land sale contract optimizations, demonstrating real-world use cases and gas efficiency improvements. Getting started requires only a web browser and optionally a Tenderly account to save and manage Sandboxes.