⚠ What this does NOT check
This only checks whether the address is structurally valid — the right shape, and (where possible) a passing checksum. It cannot tell you whether it's the correct recipient, whether it belongs to a scammer, or whether the exchange/wallet you're sending from actually supports that network. A technically "valid" address can still be the wrong one. Always send a small test amount first and confirm it arrives before sending the rest — the same rule as every guide on this site.
How this works: everything runs as JavaScript in your browser. The address you paste is never sent to a server, logged, or stored anywhere — refresh the page and it's gone. Full detail in the Privacy Policy. Don't take our word for it — right-click → "View Page Source" to read the exact code yourself (see Our Promises).