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Welcome to SubWallet Extension

SubWallet is a comprehensive Web3 wallet solution designed for the Polkadot, Substrate, and Ethereum ecosystems. Built as a browser extension, SubWallet provides a secure, non-custodial way to manage your digital assets, interact with decentralized applications (dApps), and participate in the multi-chain Web3 ecosystem.

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What is SubWallet?

SubWallet Extension is forked from polkadot-js/extension and enhanced with powerful features while maintaining compatibility with the original codebase. As a non-custodial wallet, you maintain complete control over your private keys and assets at all times.
SubWallet Extension v - Built and maintained by Koni Studio

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Key Features

Multi-Chain Support

Support for Polkadot, Substrate, and Ethereum-based networks with seamless cross-chain interactions

Asset Management

Manage tokens, NFTs, and track your portfolio across multiple chains in one unified interface

Staking & Earning

Participate in staking, liquid staking, and earning opportunities with built-in APY tracking

dApp Integration

Seamlessly connect to decentralized applications with injected wallet support

Cross-Chain Transfers

Transfer assets between different chains with built-in bridge support

Advanced Features

Support for multisig accounts, proxy accounts, OpenGov participation, and more

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Supported Ecosystems

SubWallet provides comprehensive support for multiple blockchain ecosystems:

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Polkadot Ecosystem

  • Polkadot - Main relay chain
  • Kusama - Canary network
  • Parachains - All major Polkadot and Kusama parachains
  • Asset Hub (formerly Statemint/Statemine)

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Substrate Chains

  • Native support for Substrate-based blockchains
  • Custom chain definitions and metadata

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Ethereum & EVM Chains

  • Ethereum mainnet
  • EVM-compatible chains (Polygon, BSC, Arbitrum, Optimism, and more)
  • Full ERC-20 and ERC-721 token support
SubWallet uses the @subwallet/chain-list package to maintain an up-to-date list of supported networks.

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How SubWallet Works

SubWallet Extension follows a secure architecture pattern: 
┌─────────────────┐
│  Browser Tab    │
│  (dApp)         │
└────────┬────────┘
         │ Inject Script
         ▼
┌─────────────────┐
│  Extension UI   │
│  (Popup/Panel)  │
└────────┬────────┘
         │ Message Passing
         ▼
┌─────────────────┐
│  Background     │
│  (Core Logic)   │
└─────────────────┘
Background Environment - Handles all secure operations, API calls, state management, and data persistence Extension UI - Provides the user interface through popup and side panel views Inject Scripts - Safely injects wallet objects into web pages for dApp interaction
All sensitive operations and private key management happen in the secure background environment, isolated from web pages.

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Recent Updates

SubWallet is actively developed with regular feature updates:
  • Multisig Account Support (Phase 1)
  • Proxy Account Support
  • OpenGov Integration (Phase 1)
  • Import from Trust Wallet
  • Locked Balance Display
  • Advanced phishing detection
  • Cross-chain swap improvements

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Why Choose SubWallet?

Non-Custodial & Secure - You control your keys and assets Multi-Chain Native - Built from the ground up for cross-chain interactions Open Source - Transparent, auditable code licensed under Apache-2.0 Active Development - Regular updates and new features Community Driven - Built by Koni Studio with community feedback

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Get Started

Ready to begin your Web3 journey with SubWallet?

Install Extension

Download and install SubWallet for your browser

Quick Start Guide

Create your first wallet and start using SubWallet

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Browser Compatibility

SubWallet Extension supports:
  • Chrome (v111+)
  • Brave
  • Edge
  • Firefox
  • Other Chromium-based browsers

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Need Help?

Join the SubWallet community:
Always keep your seed phrase secure and never share it with anyone. SubWallet will never ask for your seed phrase.

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