CRYSTAL-TOOL-FORMAT(1) Crystal Compiler Command Line Reference Guide NAME crystal-tool-format - Format Crystal source files SYNOPSIS crystal tool format [options] [source...] DESCRIPTION Format project, directories and/or files with the coding style used in the standard library. OPTIONS --check Only check conformity but do not apply any changes. crystal 1.21.0 2026-07-23 CRYSTAL-TOOL-FORMAT(1)