Check a Wallet Address Before Sending Crypto – Free, No Sign-Up

Crypto transfers can't be reversed. Once you press "send", there is no bank to call and no chargeback to request. That's why the few seconds before a transfer matter more than anything that happens after it.

ScamSonnar now lets you run one free check on any wallet or contract address, straight from the homepage. No account, no email, no wallet connection. Here's what it shows, how to use it and where its limits are.

Why check an address before you send

Most crypto losses don't come from sophisticated hacks. They come from sending funds to the wrong place:

• Fake support agents and so-called recovery services that ask you to move funds to a "safe" wallet.
• Address poisoning, where a scammer sends you a tiny transaction from an address that looks almost identical to one you use. It's the main reason you should never copy an address from your transaction history.
• Investment and romance scams that ask for a deposit to a personal wallet.
• Fresh tokens and contracts with hidden traps, such as honeypot tokens that let you buy but not sell.

A quick look at an address's history won't catch everything, but it often shows warning signs that are easy to miss when someone is rushing you.

What the free check shows

Paste an address and ScamSonnar reads its public blockchain history. The result includes:

• A risk level and score, so you see at a glance whether anything stands out.
• The network or networks where the address is active.
• The type of address: a regular wallet, a smart contract or a known service, if we recognize it.
• Activity and balance: how many transactions the address has and what it currently holds.
• Warning signs in plain English, each with a short explanation of why it matters.

The check covers 10 networks: Ethereum, BNB Smart Chain, Polygon, Base, Arbitrum, Optimism, Robinhood Chain, Solana, Tron and Bitcoin. You don't need to pick one. The network is detected automatically, and because an EVM address is the same on every EVM chain, all seven EVM networks are checked in one go.

You can also share the result with a link. That's useful if a friend or family member is about to send money and wants a second opinion.

How to run a free check

1. Go to scamsonnar.com.
2. Paste the wallet or contract address into the box at the top.
3. Click Check now.

That's it. You don't connect a wallet, sign anything or give us an email address. ScamSonnar only reads public data. We never ask for your private keys or recovery phrase, and anyone who does is not us.

The fair-use limits

To keep the free check available for as many people as possible, there are a few simple rules:

• One free address per day. You can re-check the same address as often as you like during that day.
• A shared daily pool. The number of free checks per day is limited for everyone together. If they run out, you'll see a message asking you to come back tomorrow.
• Busy moments. If many people are checking at once, you may be asked to try again in a few minutes.

If you need more, a free account gives you 5 scans every day, saved scan history and a watchlist address, still at no cost.

What a result does and doesn't mean

A clean result is a good sign, but a low risk score is not a guarantee. Keep these in mind:

• New addresses have no history. A wallet created yesterday can't show warning signs yet. Be extra careful with addresses you received from strangers.
• Not everything is visible on-chain. Funds held on exchanges or in some staking and DeFi setups may not show up in a public blockchain scan.
• A warning isn't proof of fraud. It's a reason to slow down, ask questions and double-check before you send.

The check gives you automated risk indicators based on publicly available data. It's not financial advice, and the final decision is always yours.

More free tools on ScamSonnar

If you're about to send or receive stablecoins, check the official USDT and USDC contract addresses first, so you don't end up holding a copycat token. You'll also find a MiCA license lookup for crypto companies, a live list of memecoin graduations from Pump.fun and Four.meme, and a feed of newly discovered tokens in the site menu. All of them are free and work without an account.

A quick checklist before you send

• Compare the whole address, not just the first and last few characters.
• Never copy an address from your transaction history without checking it.
• Be suspicious of anyone who creates urgency: "send now or lose your funds".
• Run a quick check on the address.
• When sending a large amount, send a small test transaction first.

A few seconds of checking can save you from a mistake you can't undo.