Rainbow is a free, open-source Ethereum wallet that runs on Windows as a browser extension for Chrome, Edge and Firefox. It suits people who want to hold and send ETH and other EVM-compatible tokens directly from their browser, without installing a separate desktop application. The project also ships versions for macOS, Linux, Android and iOS, but the Windows route covered here is the browser extension.
Because the code is public on GitHub, developers and technically minded users can read how the wallet handles keys and transactions. Newcomers should learn the basics first: a wallet controls your assets through a secret recovery phrase, so setup and backup deserve more attention than the interface itself. This guide covers installation, daily use, safety checks and how Rainbow compares with other wallets.
What Is an Ethereum Wallet?
An Ethereum wallet does not hold coins in the way a bank account holds money. Your assets live on the blockchain, and the wallet stores the cryptographic keys that prove you control a given address. When you send ETH or a token, the wallet signs the transaction with your private key and broadcasts it to the network.
Every address is a long string of characters derived from a public key. Anyone can see a balance at an address, but only the holder of the matching private key can authorize a transfer. This is why a wallet is often described as self-custody software: the responsibility for keeping keys safe sits with you.
Transactions also require gas, a fee paid to the network for processing. Wallets display an estimate before you confirm, and reading that estimate carefully helps you avoid overpaying. Understanding these basic pieces makes it easier to evaluate any Ethereum wallet, including Rainbow.
Who Is Rainbow for?
Rainbow fits several types of users. A person who receives ETH from friends or an employer and wants to check balances from a Windows PC will find the browser extension straightforward. A user who regularly interacts with decentralized apps can keep their wallet one click away instead of switching to a separate program.
Developers and curious users benefit from the public code on GitHub. Reading how a wallet builds transactions or manages accounts is a practical way to learn how Ethereum tools work under the hood. Testing a workflow with a small amount before moving larger sums is a sensible habit for anyone exploring the software.
Rainbow is less suited to people who need many blockchains in one app. Its focus is Ethereum and EVM-compatible networks, so users who hold assets across unrelated ecosystems may prefer a multi-currency wallet from the alternatives list below.
How Browser Extension Wallets Work
A browser extension wallet runs as a small program inside the browser. When a website wants to interact with Ethereum, it asks the extension through a standard interface. The extension then shows a confirmation popup describing the request, and nothing is sent until you approve it.
This design is convenient, but it changes the risk profile. Browser extensions share the browser's environment, so a malicious or copied extension, or a phishing website that imitates a familiar app, can try to trick you into approving the wrong action. Reading each confirmation screen, checking the recipient address and the network, and bookmarking trusted sites reduce this risk.
Keeping the browser itself updated and using a separate browser profile for crypto activity can also limit exposure. These habits matter more for extensions than for offline tools, because the wallet is always one click away from the websites you visit.
Key features
Ethereum and EVM focus
Browser-based access on Windows
Open-source code
Supported coins
Rainbow is centered on Ethereum, with ETH as its core asset, and it works with EVM-compatible networks. These are chains that follow Ethereum's account format and transaction rules, so familiar addresses and signing methods carry over. Network options can change between releases, so review the list shown inside the extension before sending funds.
How to install Rainbow on Windows
- 1
Open the browser and find the extension
Start in Chrome, Edge or Firefox. Go to rainbow.me and download only from the official website, following its link to the extension for your browser. Avoid sponsored search results and copies shared on forums, since fake extensions often use similar names.
- 2
Check the publisher before you add it
Review the publisher name and the listing details on the extension page, and confirm they match Rainbow's official site. If you download a packaged file from the GitHub Releases page instead, compare its SHA-256 checksum with the value published there before installing it.
-
Pin the extension and set up the wallet
Pin the extension to your toolbar for quick access, then open it and follow the setup screens. Choose a strong password when prompted and lock the wallet whenever you step away from your computer.
How to use Rainbow
Using Rainbow is straightforward once the extension is installed and your wallet is set up. The steps below show a sensible routine for everyday transfers, which keeps mistakes to a minimum.
- Open the extension from your browser toolbar and unlock the wallet with your password.
- Confirm that the network shown at the top matches the chain you intend to use, such as Ethereum mainnet.
- Review your balance and copy the receiving address from the account screen when someone needs to send you funds.
- Before sending, paste or select the recipient address and compare the first and last characters against the original source.
- Check the gas estimate and the total amount in the confirmation popup, then approve only if both match your expectations.
- After the transaction is broadcast, note the transaction hash and check its status on a block explorer.
- Lock the wallet when you finish, so the extension cannot sign anything without your password.
Testing with a small amount first is a good habit for any new recipient or website.
Pros & cons
- Free to use, with no license cost mentioned in the project's listing
- Open-source code that can be reviewed publicly on GitHub
- Focused on Ethereum and EVM-compatible networks
- Runs in Chrome, Edge and Firefox on Windows without a separate desktop install
- The same project also has versions for macOS, Linux, Android and iOS
- Windows access is through a browser extension rather than a standalone desktop application
- Browser extensions share the browser's environment, so they require extra vigilance against phishing
- Network coverage centers on Ethereum and EVM chains, so it is not a broad multi-chain wallet
- Like any self-custody wallet, there is no account recovery if you lose your recovery phrase
Is Rainbow safe?
Rainbow controls access to your keys, so treat setup as a security task. Download it only from rainbow.me or from the official GitHub repository at rainbow-me/rainbow. Where a file or checksum is published, verify its SHA-256 hash or signature before installing, and be cautious about copycat extensions with similar names.
Never enter your recovery phrase on a third-party website, in a chat or in an email. Legitimate support staff never ask for it. Store the phrase offline, on paper or in a secure physical location, and avoid photographing it. Always check the latest version on the official website before installing or updating.
- Official source only. Download from rainbow.me. Ignore ads and lookalike domains.
- Check the SHA-256. Compare the installer hash with the value the developer publishes before running it.
- Never share your seed phrase. No developer, support agent or website — including CryptApps — will ever ask for it.
Alternatives
Rainbow stands apart from several similar programs by its narrow focus. Frame is a desktop Web3 wallet, which appeals to users who prefer a standalone app rather than a browser extension. MyCrypto also centers on Ethereum accounts, but it offers a different interface and workflow. If you prefer a broader setup, Stack Wallet and Cake Wallet are multi-currency options that cover more assets. MyTonWallet targets the TON ecosystem, so it serves a different community.
Choose Rainbow if you want a lightweight Ethereum and EVM wallet inside Chrome, Edge or Firefox on Windows. Choose a desktop or multi-currency wallet if your holdings span several unrelated blockchains or you want a separate application outside the browser.
Specifications
- Price
- Free
- Type
- Open source
- License
- —
- Latest version
- —
- Last update
- —
- Windows support
- Browser extension (Chrome/Edge/Firefox)
- Official site
- rainbow.me
- Source code
- github.com/rainbow-me/rainbow
Frequently asked questions
Yes, Rainbow is listed as free. You can download it at no cost from its official website or from the GitHub repository. Be aware that blockchain transactions carry their own network fees, which are separate from the wallet itself.
Yes, on Windows Rainbow is available as a browser extension for Chrome, Edge and Firefox. You install it in your browser rather than as a standalone desktop program, then manage your Ethereum and EVM-compatible assets from the toolbar popup.
Rainbow can be used safely when you download it from the official website or GitHub, verify the file or publisher, and keep your recovery phrase private. Most risks come from phishing sites and fake extensions, so confirm every transaction carefully before approving it.
Yes, Rainbow's source code is published on GitHub under the rainbow-me organization. Anyone can read the code, review changes and report issues, which adds transparency. Open code does not replace your own safety habits, but it lets independent reviewers check how the wallet works.
Rainbow is centered on Ethereum and works with EVM-compatible networks, which use the same account format and transaction rules. ETH is its core asset. Check the network selector inside the extension to see which chains are currently available.
Frame, MyCrypto, Stack Wallet and Cake Wallet are common alternatives. Frame suits people who want a desktop Web3 wallet, while Stack Wallet and Cake Wallet cover more currencies. The best choice depends on whether you need a browser extension, a standalone app or support for several blockchains.
No, you do not need developer tools to use the ready-made Rainbow extension. Build tools such as Node.js, Xcode or CocoaPods are only needed if you compile the project from its source code. Ordinary users can install the browser extension and start setup right away.
Verdict
Rainbow suits people who want a free, open-source Ethereum and EVM wallet that runs inside Chrome, Edge or Firefox on Windows. It is a good fit for anyone already active in the Ethereum ecosystem who values transparent code and a light setup. Beginners can use it too, as long as they take backup and phishing protection seriously. If you need a standalone desktop app or support for many unrelated blockchains, compare it with the alternatives before deciding.