What is Lantstool?

Lantstool is an open-source, client-side development interface purpose-built for the NEAR blockchain. It enables developers to manage transactions, work with cryptographic keys, interact with RPC endpoints, and inspect account details—all within a single, streamlined interface.

🔍 Core Capabilities

🧱 1. Transaction and Call Builder

Lantstool allows developers to create, preview, save, and reuse transactions and contract calls. These can be exported/imported in JSON, making them versionable and shareable for team workflows.

🔐 2. Key and Account Management

A built-in key generator lets you create cryptographic key pairs directly in the browser. Keys are stored securely in local storage, separated by workspace and network to ensure proper isolation.

🌐 3. RPC Access and API Testing

Lantstool serves as a graphical frontend for NEAR RPC endpoints. Developers can issue view and change function calls, test contracts, or simulate transactions—all without touching the command line.

📊 4. Real-Time Account Insights

The platform retrieves detailed information about NEAR accounts: balance, state usage, storage costs, access keys, and associated contracts. This provides a full diagnostic view of an account’s structure.

🔧 5. Utility Toolbox

Lantstool includes several auxiliary tools:

• Unit Converter – Easily switch between yoctoNEAR, NEAR, and other denominations.

• Contract WASM Downloader – Download deployed smart contracts in raw WebAssembly format.

• Account Cleaner Tool – Clean up large accounts or remove specific state items when standard deletion fails.

✨ New in Version 1.3.0

Lantstool’s latest update (v1.3.0) introduces notable improvements:

• Account Cleaner Utility
  Lets users surgically remove state, access keys, or contracts—especially useful for unblocking accounts with storage bloat.

• Dedicated Utility Pages
  Each tool now lives on a distinct page, and the app remembers your last active tab for a smoother dev experience.

• Enhanced Key Separation
  Workspace- and network-based scoping of keys adds clarity and avoids cross-contamination.

• Streamlined UX and Bug Fixes
  Dozens of subtle enhancements make this release more intuitive and polished.

Explore the full release notes for technical details.

🧠 Ideal Use Cases

• Developers needing a graphical smart contract playground.

• Educators demonstrating how NEAR works in a classroom or workshop.

• QA teams looking for a rapid way to simulate or debug contract behavior.

• Anyone who prefers full control of their keys without using custodial wallets.

🔗 Try Lantstool Today

• 🔗 Live Demo: app.lantstool.dev

• 📦 Source Code: GitHub – ui.web.lantstool

• 🎥 Overview Video:

Whether you’re just getting started with NEAR or are deep in production, Lantstool will radically accelerate your workflow while keeping you in full control.