# MetaMask

:globe_with_meridians: :electric_plug: The MetaMask browser extension enables browsing Ethereum blockchain enabled websites

Repository: https://github.com/MetaMask/metamask-extension
Canonical: https://ross.abutalabs.com/products/metamask
Homepage: https://metamask.io
Language: TypeScript
License: NOASSERTION
License Family: other
Topics: chrome, extension, ethereum, firefox, dapp, dapp-developers, opera, brave, edge
Last push: 2026-08-27T00:08:49+00:00
Link (homepage): https://metamask.io
Link (site_page): https://metamask.io/faqs
Link (site_page): https://docs.metamask.io/

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 86, longevity 100
- inputs: {"age_days": 4014, "days_push": 7, "days_rel": 13, "gap_med": 4, "n_releases_24m": 138}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 13204, forks 5575 (observed 2026-08-28T04:11:02.513522+00:00)

## What it is
MetaMask is a self-custodial crypto wallet available as a browser extension (Chrome, Firefox, Brave, Edge, Opera) and mobile app, enabling users to manage Ethereum, EVM, and Solana assets and interact with dapps. The open-source repositories contain the extension and mobile client code, plus extensibility via Snaps.

## Use cases
- connect my dapp to users' crypto wallets
- sign ethereum transactions from a browser extension
- manage erc-20 tokens and nfts in a self-custodial wallet
- browse and use web3 dapps in chrome or firefox
- swap tokens across multiple evm networks
- extend wallet functionality with custom snaps
- onboard users to a dapp with embedded wallets

## When to choose
- you need a widely adopted, battle-tested web3 wallet for dapp integration
- you want multichain support across EVM networks and Solana
- you need extensible wallet features via the Snaps plugin system
- you want a wallet with mobile and browser parity

## When to avoid
- you need a non-custodial server-side wallet for backend services
- you only need raw blockchain RPC access without key management
- you require a fully permissively licensed codebase for redistribution

## Facets
- artifact type: application
- maturity: active
- function: security, cryptography, browser-extension, sdk, developer-tools
- domain: blockchain, browser-extensions, web-development, privacy
- platform: browser, browser-extension, cross-platform
- tags: crypto-wallet, ethereum, web3, dapp-browser, self-custodial-wallet, snaps, multichain, solana, nft, cryptocurrency, android, ios, javascript

## Member repositories
- MetaMask/metamask-extension (main) score 95
- MetaMask/metamask-mobile (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:02.513522+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:13:26.931547+00:00, confidence not recorded.
  - readme: https://github.com/MetaMask/metamask-extension (fetched 2026-08-28T04:11:02.513522+00:00, sha 786ff9accc08)
  - homepage: https://metamask.io (fetched 2026-08-29T08:09:29.449337+00:00, sha c1600067547b)
  - site_page: https://docs.metamask.io/ (fetched 2026-08-29T08:09:29.461801+00:00, sha 7a8a122397be)
  - site_page: https://metamask.io/faqs (fetched 2026-08-29T08:09:29.458992+00:00, sha e122ea7c7971)
- Data as of 2026-08-30T08:39:29.467469+00:00.