Tenderly Sandbox
A fast prototyping environment for Solidity smart contracts that runs entirely in the browser with integrated debugging and transaction simulation.
Overview
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.
The Problem
Developers face high barriers when prototyping and testing Solidity smart contracts due to complex local setups, fragmented tools, and limited debugging capabilities. Sharing and collaborating on smart contract code is also cumbersome without easy-to-use, shareable environments.
The Solution
Key Features
Temporary Ethereum forks with pre-funded accounts
Each run creates a fork with 10 accounts funded with 100 ETH for testing transactions.
Dual editors for Solidity and JavaScript
Write smart contracts and scripts to deploy/interact with them side-by-side.
Support for Ethers.js and Web3.js libraries
Built-in JavaScript libraries to interact with contracts on the fork.
Customizable environment settings
Select network, block number, compiler version, and optimization levels.
Key Strengths
How Developers Use Tenderly Sandbox
Rapid smart contract prototyping and testing
Developers can quickly write and test Solidity contracts with instant feedback and debugging without local setup.
Educational tutorials and workshops
Educators use shareable Sandboxes to demonstrate Solidity concepts and blockchain interactions interactively.
Gas optimization analysis
Developers analyze and optimize contract gas usage using detailed transaction traces and real contract examples.
Works Well WithEthereumEVM Chains
Power your next build
Discover trusted tools and services in the QuickNode Marketplace. Everything you need to launch faster and scale smarter.
Tenderly Sandbox Alternatives
Explore web3 competitors and apps like Tenderly Sandbox.
Core API
A Document Object Model for Web APIs designed to simplify API consumption and integration.
0x
0x provides battle-tested APIs to embed fast, gasless, and deeply liquid crypto trading into decentralized applications.
Blast API
Blast API is a decentralized Web3 infrastructure platform providing geographically distributed blockchain node APIs to improve reliability and latency.
Subgraphs
The Graph is a decentralized indexing protocol that organizes blockchain data and makes it easily accessible via GraphQL.
Virtual TestNets
Virtually operated Web3 networks that replicate real blockchain networks for development, testing, and staging without using real assets.
Connext
Connext is a secure, fast modular interoperability protocol enabling cross-chain fund bridging and asynchronous Solidity development.
Rarible
Rarible API is a fast, unified NFT API infrastructure providing real-time data and executable market features across Ethereum, Base, Polygon, and more than 10 other chains.
Rollups as a Service
A fully managed, customizable rollup deployment platform providing scalable, secure, and high-performance blockchain infrastructure.
Network APIs
Network APIs provides web3 developer tools focused on blockchain network interactions and API services.
Pricing
Free | Pro | |
|---|---|---|
| Price (Monthly) | Free | Custom pricing |
| Price (Annual) | Free | Custom pricing |
| Messaging | N/A | Priority support and onboarding |
| Support | Community support via Discord and GitHub | Dedicated support and SLAs |
| Analytics |
Resources
Tenderly provides comprehensive documentation, tutorials, and example Sandboxes to help developers get started quickly with the Sandbox environment and advanced smart contract debugging.