Free tool · crypto safety
Crypto Address Checker
Before you send crypto, confirm the address hasn’t been swapped for a lookalike. “Address poisoning” slips a near-identical address into your history — same start and end, different middle — hoping you’ll copy it by mistake. Paste both addresses to check.
100% private. Addresses are compared entirely in your browser — nothing is sent to us, logged, or stored.
Paste both addresses to compare
Enter the address you’re about to send to, and the address you meant to use. We’ll show you exactly where they differ.
Scan your address book / history
Paste several addresses (one per line) to check whether any two are dangerous lookalikes — a sign your history may already be poisoned.
Golden rules to stay safe
- 1
Verify the WHOLE address, not just the first and last few characters.
- 2
Never copy an address from your transaction history — always get it from the original, trusted source.
- 3
Save trusted addresses to a whitelist / address book and reuse those.
- 4
For any large transfer, send a tiny test amount first and confirm it arrives.
Add a hardware layer
A hardware wallet makes you confirm the real destination address on a separate screen — a strong defense against address swaps and malware.
New to this attack? Read our full address-poisoning guide →
The partner link may earn us a commission at no cost to you. Learn how we make money.