Bitcoin Address
Balance, unspent outputs and activity for any Bitcoin address.
Reads public data
Paste a Bitcoin address.
About bitcoin address
Bitcoin has no balance field anywhere in it. An address owns a set of unspent transaction outputs, and a payment destroys whole outputs and creates new ones, paying any remainder back to itself as change. The balance shown here is therefore just everything ever received minus everything ever spent. That model is also why the number of outputs matters as much as their total: each one costs vbytes to spend, so a wallet holding hundreds of tiny outputs can cost more in fees to empty than the outputs are worth — which is what makes unsolicited dust a nuisance rather than a gift. The lookup runs from your browser straight to mempool.space, so no server of ours ever learns which address you asked about.
Common questions
How do I check a Bitcoin address balance?
Paste the address. This reads the balance, the unspent outputs behind it and recent activity, straight from your browser to mempool.space — the lookup does not pass through us, so we never see which address you asked about.
What is a UTXO?
Bitcoin has no balance field. An address owns a set of unspent transaction outputs, and a payment spends whole ones and pays the remainder back to itself as change. A balance is simply everything received minus everything spent, which is why a wallet holding many tiny outputs can cost more in fees to empty than they are worth.