Tool Index

Here, we provide a list of tools available for your development needs. They are sorted by context. If you're actively maintaining a tool that might be useful to other Polkadot, Kusama or Substrate developers, feel free to add it in.


Please see the Wallets page.

Block Explorers

  • Polkadot-JS Apps Explorer - Polkadot dashboard block explorer. Supports dozens of other networks, including Kusama, Westend, and other remote or local endpoints. Access via IPFS

  • Polkascan - Blockchain explorer for Polkadot, Kusama, and other related chains. Repo.

  • Subscan - Blockchain explorer for Substrate chains. Repo.

  • DotScanner - Polkadot & Kusama Blockchain explorer.

Network Monitoring & Reporting

  • Polkadot Telemetry Service - Network information including what nodes are running the chain, what software versions they are running, sync status, and location.

  • Polkabot - Polkadot network monitoring and reporting using Matrix (Riot / Element) chat. Users may create custom bot plugins. Blogpost.

  • Ryabina's Telegram Bot - A Telegram bot for monitoring on-chain events of Substrate chains. GitHub Repository

  • PolkaStats - Polkadot network statistics (includes Kusama). Shows network information and staking details from validators and intentions. GitHub Repository.

  • Panic - A node monitoring and alert server for validators.

  • OpenWeb3/Guardian - A CLI tool and JS library to monitor on chain states and events.


  • Polkadot - The original Rust implementation of the Polkadot Host.

  • Kagome - A C++ Polkadot implementation of the Polkadot Host developed by Soramitsu.

  • Gossamer - A Go implementation of the Polkadot Host developed by ChainSafe Systems.

  • TX Wrapper - Helper functions for offline transaction generation.


  • Substrate - Blockchain development platform written in Rust. The Rust version of the Polkadot Host is being built with Substrate.

  • Substrate Docs - Comprehensive documentation and tutorials for building a blockchain using Substrate.

  • Substrate Debug Kit - A collection of debug tools and libraries around substrate chains. Includes tools to calculate NPoS elections offline, disk usage monitoring, test templates against chain state and other pallet-specific helper.

  • Diener - A tool for easy changing of Polkadot or Substrate dependency versions.

  • Polkadot Launch - A tool to easily launch custom local parachain-enabled Polkadot versions.

  • Halva - A Truffle-inspired local development environment for Substrate.

  • Fork-off Substrate - Copies the state of an existing chain into your local version and lets you further experiment on it.

  • srtool - A tool for verifying runtime versions against on-chain proposal hashes.

  • sub-bench - A tool to spam your node with transactions for the sake of benchmarking.

  • substrate-devhub-utils - A set of JavaScript utilities making life with Substrate a little easier.

  • sub-flood - A tool to benchmark Substrate by flooding it with requests.



Polkadot-JS Common

Polkadot-JS Common provides various utility functions that are used across all projects in the @polkadot namespace and is split into a number of internal utility packages. The documentation and usage instructions are provided at Polkadot-JS/Common API Documentation.

  • @polkadot/keyring This allows you to create and load accounts in JavaScript. It is helpful for creating wallets or any application that will require the user to write to chain. Examples.

  • @polkadot/util Utility functions like checking if a string is hex-encoded.

  • @polkadot/util-crypto Useful cryptographic utilities for developing with Polkadot.

CLI Tools


WebAssembly related tools and projects.

  • ink! - An eDSL to write WebAssembly based smart contracts using the Rust programming language.

  • parity-wasm - Low-level WebAssembly format library.

  • wasm-utils - Collection of WebAssembly utilities used in pwasm-ethereum and substrate contract development.

  • wasmi - A WebAssembly interpreter conceived as a component of parity-ethereum (Ethereum-like contracts in Wasm) and Substrate.

RPC and API Tools


The SCALE (Simple Concatenated Aggregate Little-Endian) Codec is a lightweight, efficient, binary serialization and deserialization codec.

It is designed for high-performance, copy-free encoding and decoding of data in resource-constrained execution contexts, such as the Substrate runtime. It is not self-describing in any way and assumes the decoding context has all type knowledge about the encoded data.

It is used in almost all communication to/from Substrate nodes, so implementations in different languages exist:

Data Crawling and Conversion

The following tools help you extract and structure data from a Substrate node.

Last updated