How to check a Bitcoin transaction on mempool.space

What you will do

• Find the Transaction ID or TXID in your wallet or exchange.
• Search for it on mempool.space.
• Tell unconfirmed from confirmed.
• See the block, fee, and fee rate.
• Understand inputs and outputs at a beginner level.
• See which transaction details are public.

Before you start: TXID and block explorer

A TXID is the unique identifier of a Bitcoin transaction. A block explorer such as mempool.space lets you use that ID to view public transaction data without connecting your wallet.

Find the TXID in your wallet

In BlueWallet, as we saw in the previous guide, you can open the transaction details and see the Transaction ID together with the status and an Explorer option. Other wallets or exchanges may use labels such as TXID, Transaction ID, Transaction hash, or View on explorer.

Open mempool.space and paste the TXID

Open mempool.space and paste the full TXID of your own transaction into the search field. If the ID is correct and the explorer knows the transaction, its transaction page will open.

Unconfirmed and confirmed are not the same

A transaction can be broadcast to the Bitcoin network and be visible without being included in a block yet. At that point it is unconfirmed. Once it is included in a valid block, it receives its first confirmation. Each later block increases the confirmation count.

There is no single central mempool for the entire Bitcoin network. Each node can have its own view of transactions waiting for confirmation. mempool.space shows its public view.

Read the basic transaction details

On a confirmed transaction page you can see the TXID, the block that contains it, the fee, and the fee rate. In the public example below, the transaction is confirmed in block 966722, with a 423 sat fee and a 3.02 sat/vB fee rate.

What do fee and fee rate mean?

The fee is the total transaction fee. The fee rate shows how many satoshis are paid per virtual byte and is usually displayed as sat/vB. When many transactions are waiting, a higher effective fee rate may receive higher priority.

What are inputs and outputs?

In very simple terms, inputs are bitcoin being used as the sources of a transaction, while outputs are the new destinations it creates. A transaction can have several inputs or outputs, and one output may be change returning to the sender’s wallet.

Why can a transaction take time?

Miners have limited block space. When demand is higher, a transaction with a lower fee rate can wait longer. mempool.space shows the status, but it is not a general cancel or repair button.

Remember that the blockchain is public

Anyone with a TXID can view public details such as addresses, amounts, fee, block, and status. They cannot see your seed phrase or private keys, but a TXID or address may be connected to more information if it has already been linked to your identity.

What you achieved

Alex had already learned how a Bitcoin transaction is sent. Now you know the next part as well: how to take the TXID of your own transaction, find it in an explorer, and check whether it has merely been broadcast or has already been confirmed in a block.

Frequently asked questions