Flow Playground

Start Emulator with the Flow CLI

How to start Flow emulator from the command line

The Flow CLI provides a command to start an emulator. The Flow Emulator is a lightweight tool that emulates the behaviour of the real Flow network.

flow emulator

⚠️ The emulator command expects configuration to be initialized. See flow init command.

Example Usage

> flow emulator start

INFO[0000] ⚙️   Using service account 0xf8d6e0586b0a20c7  serviceAddress=f8d6e0586b0a20c7 ...

To learn more about using the Emulator, have a look at the README of the repository.



  • Flag: --config-path
  • Short Flag: -f
  • Valid inputs: valid filename

Specify a filename for the configuration files, you can provide multiple configuration files by using -f flag multiple times.


  • Flag: --init

⚠️ Deprecated: use flow init instead.

Initialize configuration during the command execution.