grc

Colorize logfiles and command output

Runs as grc|macOS, Linux, Windows|kassiopeia.juls.savba.sk

Command form

ai-draft · 2 tasks · 4 fields

Run another command with its output colourised through grcat. The command is entered as one quoted string; the /etc/grc.conf rules are not edited here.

Opens the form; the finished command lands at your prompt, unrun

Run in Otty

otty gui grc

Colourise a commandExample values, fixed in this page — nothing here reaches a terminal

Basic

Command to run*

string

Colour mode

3 choicesenum

TasksEach one presets the form for one job

Colourise a command

commandcolour

Colourise stdout and stderr

commandstderrstdout

ParametersOnly these flags are editable in the form

Command to run

The command and its arguments.
string · positional 0 · repeatable

Colourise error output

boolean

--stderr-e

Colourise standard output too

Use together with Colourise error output.
boolean

--stdout-s

Colour mode

enum

--colouronoffauto

SourcesEvery flag above is checked against these

man

grc [options] "command [args]" -e --stderr Redirect error output. -s --stdout Redirect standard output. Used to redirect standard output together with --stderr option. --colour=x x is one of on off auto --colour=on will colourise (default) --colour=off will just execute command without colourising. --colour=auto will test if standard output is a tty, a…

manualmaster 2026-10-27

github.com

Before it fills your prompt, Otty checks the installed grc against its version. A form that does not match your version is not offered.