Bitcoin tools that run Bitcoin Core in your browser.

Each tool boots a Linux machine, emulated in WebAssembly in the tab, and runs an unmodified, offline Bitcoin Core in it. Your files never leave the browser, and the machine is gone when you close the tab.

No network deviceOfficial binaries, sha256-verifiedx86-64 Linux in WebAssemblyOpen source

Tools

Built on

A real machineAn x86-64 PC in WebAssembly (v86_64, with a 64-bit JIT) boots Alpine Linux in about half a minute.

Real Bitcoin CoreThe official release, checked against its sha256 and run unchanged with networking turned off.

Nothing leavesYour file reaches the machine through a shared folder in the page; results come back the same way.