---
title: Polkadot Utilities
description: Interactive encoding, hashing, and address utility tools for Polkadot development. Convert strings, balances, and numbers to hex, hash inputs with Blake2 and XXHash, and derive or re-encode Polkadot addresses.
categories:
- Tooling
url: https://docs.polkadot.com/tools/
word_count: 303
token_estimate: 472
version_hash: sha256:ec640f825e02b2dd82cbbc391abe8980f80aede8dbb6394fc37d88d43bf88282
last_updated: '2026-04-02T14:35:50+00:00'
---

# Polkadot Utilities

This page provides interactive utilities for common Polkadot-SDK-based development tasks. Tools are powered by the [@polkadot/util](https://github.com/polkadot-js/common/tree/master/packages/util), [@polkadot/util-crypto](https://github.com/polkadot-js/common/tree/master/packages/util-crypto), and [@polkadot/keyring](https://github.com/polkadot-js/common/tree/master/packages/keyring) libraries and run entirely in your browser.

## Encoding & Decoding

Convert between strings, numbers, byte arrays, and their hexadecimal representations. Bidirectional tools update both fields in real time as you type.

<div id="encoding-root"></div>

## Hashing

Hash arbitrary inputs using Blake2 and XXHash — the two hashing algorithms used throughout the Polkadot SDK for storage key derivation and other primitives. The **concat** variants append the original input to the hash output, matching the `Blake2_128Concat` and `Twox64Concat` storage hashers.

<div id="hashing-root"></div>

## Address Utilities

Derive, convert, and re-encode Polkadot addresses. These tools cover the full range of address types used in the Polkadot ecosystem — from standard SS58 addresses and Ethereum-compatible addresses to pallet module accounts, sovereign accounts for parachains, and derived sub-accounts.

!!! warning
    Never enter seed phrases or private key URIs for accounts that hold real funds. Use only test accounts or development keys (e.g. `//Alice`) with the Seed → Address tool.

<div id="address-root"></div>

Convert addresses between Ethereum (EVM) and Polkadot (SS58) formats. Use the network selector to target a specific chain's SS58 prefix. When converting SS58 → ETH, check the box to confirm the account was originally mapped from an Ethereum key.

<div id="account-converter-root"></div>

## Asset ID to ERC20 Address

Derive the ERC20 precompile address for a given asset ID. This is the address your smart contract uses to interact with Polkadot Hub assets via the standard ERC20 interface.

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