How to Read a Block Explorer

A block explorer is a website that reads a blockchain and displays it. It has no special authority: it shows the same public data your own node would, formatted for people rather than software. That makes it the one place where a claim about a transaction can be checked against the record instead of taken on trust.

The three things you can look up

A transaction hash is the receipt: paste it and you see the sender, the recipient, the amount, the fee and whether it has been included in a block. An address shows a balance and the history of everything that has moved through it. A block shows the transactions confirmed together at one moment, and who produced it.

Reading a transaction page

Status is the field that matters first. Pending means the transaction has been broadcast and not yet included; success means it was included and executed; failed means it was included, the fee was still paid, and the intended effect did not happen. A failed transaction that cost a fee is normal and not a sign of theft.

Confirmations count the blocks built on top of the one containing it. More confirmations mean more work would have to be undone to reverse it, which is why exchanges credit deposits after a threshold rather than immediately.

On a smart-contract chain, look past the amount. A transaction moving no value at all can still be granting a spending allowance over your tokens, and the explorer's decoded input or token-approval view is where that appears.

What it does not tell you

An explorer shows what happened, not who did it or why. Labels attached to addresses are the explorer's own annotations and can be wrong or absent. A token appearing in your address costs nothing for a stranger to send and is not evidence of anything.