Pre-sign transaction preview
See the exact balance change before you approve: what leaves, what arrives, what the fee costs, and whether an approval is unlimited.
Chromium & Firefox · Free · Non-custodial
The wallet that shows you exactly what you're signing.
One browser extension for every chain you use. Rabby simulates each transaction before you approve it, switches networks for you, and keeps your keys encrypted on your own device.
- Pre-sign preview
- 80+ networks
- No email required
80+Networks supported
0Keys we hold or see
1Balance for every chain
FreeInstall and use forever
Overview
What is the Rabby Wallet Extension?
Rabby Wallet Extension is a self-custody crypto wallet built for people who live across chains. Add it to your browser and one extension holds your Ethereum, Arbitrum, Base, Optimism and Polygon assets side by side. Before you sign, Rabby simulates the transaction and shows exactly what leaves your wallet and what comes back, flagging risky approvals before they cost you. Networks switch automatically, every token sits in one balance, and you connect to thousands of dApps without juggling accounts. Your keys stay encrypted on your device. Free to install, open source, built to make multi-chain trading feel like one click.
≈ 100 words · Written for the Rabby Wallet Extension landing page.
Features
Built for people who actually sign transactions
Every screen in the extension is designed to remove one risk or one repetitive click.
Automatic network switching
Open a dApp on any supported chain and Rabby switches the network for you, so you never hunt through settings mid-trade.
One balance, every chain
Tokens are grouped by asset across networks, so your USDC on Base and your USDC on Arbitrum are one clear number instead of five confusing ones.
Approval and risk warnings
Risky contracts, brand-new tokens and permissions you probably don't need are flagged in plain language before the signature, not after.
Hardware wallet ready
Pair a Ledger or Trezor and keep keys offline while still getting full multi-chain coverage and simulation inside the extension.
Open source & non-custodial
The code is public and audited, and your recovery phrase never leaves your device. Nobody but you can move your funds or reset your wallet.
Networks
One extension. Every chain you trade on.
Rollups, sidechains and the networks still finding their footing — all in the same wallet, all simulated the same way. New chains are added as they ship, with no second extension to install.
Which chains are supported?- Ethereum
- Arbitrum
- Base
- Optimism
- Polygon
- BNB Chain
- Avalanche
- zkSync Era
- Linea
- Scroll
- Blast
- Gnosis
- Mantle
- Celo
- + 65 more
Security
Your keys. Your device. Your call.
A wallet is only as good as the habits around it. Here is how the extension keeps the risky parts in front of you.
Locally encrypted keys
Your secret recovery phrase is encrypted on your machine and unlocked with your own password. It is never uploaded, never emailed and never recoverable by us.
Simulation before signature
Every transaction is dry-run against live chain state first, so a malicious contract that tries to empty an unrelated token shows up as exactly that.
Permission you can revoke
Connected sites and token approvals are listed in one place, so cleaning up after an old dApp takes seconds instead of a blockchain explorer.
Security reminder: no legitimate wallet — Rabby included — will ever ask for your recovery phrase. Never type it into a website, a chat, or a support form.
FAQ
Questions, answered
Everything people ask before adding Rabby Wallet Extension to their browser.
Get the ExtensionIt is a free, self-custody crypto wallet that lives inside your browser. It holds your tokens across 80+ networks, simulates transactions before you approve them, and connects to dApps without you switching networks by hand. You install it like any other browser add-on and it becomes the wallet your dApps talk to.
Yes. Installing and using the extension costs nothing, and there is no subscription, no premium tier and no hidden wallet fee. The only cost you ever pay is the normal network fee charged by the blockchain itself for executing a transaction.
No. Rabby is non-custodial, which means your keys are created and encrypted on your own device and only you can move your funds. Nobody on the Rabby team can access your wallet, freeze it or reset it for you — if you lose your recovery phrase, the wallet cannot be restored by anyone else.
Ethereum, Arbitrum, Base, Optimism, Polygon, BNB Chain, Avalanche, zkSync Era, Linea, Scroll, Gnosis, Mantle, Celo and many more — over 80 networks in total. You can also add a custom network if you are running a chain that is not on the list yet.
Install only from the official Rabby website or its official listing in the Chrome Web Store, Edge Add-ons or Firefox Add-ons — never from a link in a message, an advert or a sponsored search result. Check the publisher name on the listing page before you click Add, and bookmark the official site so you always land in the right place.
Yes. You can import with a recovery phrase, a private key, a hardware device, or by connecting another browser wallet. Your addresses and balances arrive with you, so you can try the simulation and network switching without moving a single token to a new address.
The extension itself is built for desktop browsers: Chrome, Edge, Brave and Firefox. On a phone, the official Rabby site is the place to check the current mobile options before you move funds around.
Ready to see your next transaction before you sign it?
Free to install. Takes under a minute. Works with the wallet you already have.