CRYSTAL-PLAY(1)  Crystal Compiler Command Line Reference Guide CRYSTAL-PLAY(1)

NAME
       crystal-play - Run the Crystal playground

SYNOPSIS
       crystal play [options] [file]

DESCRIPTION
       Starts the crystal playground server on port 8080, by default.

OPTIONS
       -p PORT, --port PORT
           Run the playground on the specified port. Default is 8080.

       -b HOST, --binding HOST
           Bind the playground to the specified IP.

       -v, --verbose
           Display detailed information of the executed code.

crystal 1.21.0                    2026-07-23                   CRYSTAL-PLAY(1)