8 tools Free · open source · no sign-up
Your Bitcoin workbench.
Check an address, decode a transaction, rescue a stuck payment or price your fee — with every answer explained in plain English. Everything runs in your browser. No accounts, no tracking, and nothing ever asks for your keys.
Private by design
No backend, no accounts, no analytics, no cookies. Anything that can be computed locally is.
Never asks for your keys
No tool needs your seed phrase or private keys, and none will ever ask. If any website does, close it.
Plain English first
A clear answer up top, the reasoning below, and the technical details one click away.
Open source
MIT-licensed on GitHub. Read the code, run it yourself, or suggest the next tool.
Live data (fees, transactions, prices) comes from the public mempool.space API, only when you ask for it. Read exactly what is sent.
On the workbench
Tools being built next
The toolbox keeps growing. Here is what is in progress.