MARKDOWNLINT(1) General Commands Manual MARKDOWNLINT(1)

markdownlint - Markdown lint tool

mdl [ options ] [FILE.md|DIR ...]

markdownlint checks an individual markdown file, or a directory of markdown files against a set of rules for syntax consistency. In its report back to the CLI, the Ruby based implementation reports the line(s) with an issue identified and how to improve it.

The configuration file to use
Only process files known to git when given a directory
Ignore YAML front matter
JSON output
Don't process any files, just list enabled rules
Only process these rules
Specify additional ruleset files to load
SARIF output
Show rule aliases instead of rule ID when viewing rules
Show kramdown warnings
Don't load the default markdownlint ruleset
Load the given style
Only process rules with these tags
Increase verbosity
Show this message
Show version

List the objectives of rules MD012, MD022, MD031 and MD032:

mdl -r MD012,MD022,MD031,MD032 -l

Scrutinize file example.md only by rules MD012, MD022, MD031 and MD032:

mdl -r MD012,MD022,MD031,MD032 ./example.md

Scrutinize file example.md by all rules available except MD033 and MD034:

mdl -r ~MD033,~MD034 ./example.md

List all rules associated to the tag indentation:

mdl -t indentation -l

Scrutinize file example.md by all rules without tag indentation:

mdl -t ~indentation ./example.md

By default, markdownlint reports sort the issues by their rule. With GNU coreutils, your shell may resort the output by the corresponding line number of the file:

mdl ./example.md | sort -t ":" -k 2 -n

Recurrent (personalized) check criteria can be saved as a style. Snippet mystyle.rb below showcases the keywords for comments, rules, tags, as well as the general syntax available:

all  # initiate with all rules implemented
rule 'MD013', :line_length => 100, :ignore_code_blocks => true
exclude_rule 'MD014'
# tag :blockquote
exclude_tag :indentation

Rules a style file activates can be listed by

mdl -s ./mystyle.rb -l

A personalized local style is applied during a check by markdownlint by

mdl -s ./mystyle.rb ./example.md

Mark Harrison, Ciro Santilli, Making GitHub Delicious, Brandon High, Matt Jankowski, David Anson, Tobias Bengfort, Loic Nageleisen, Will Fleming, Jean-Christophe Gay, sudodoki, David Rodríguez, Garth Braithwaite, Alexander Köplinger, Simon Symeonidis, Jakub Wilk, Eitan Adler, David Rodríguez, Phil Dibowitz, David Somers-Harris, copperwalls, John Trammell, Waylan Limberg, Ash, Paul B, Andrew Janke, Adam Strickland, Naomi Reeves, Olle Jonsson, Lauritz Hilsøe, Andrew Janke Roman Kolesnev, Alex Harvey, Tim Smith, Tim Smith, tsuburin, Mikael Kjaer, Caleb Buxton, Mark E. Schill, Waldir Pimenta, Ben van B, Jose Angel Pardillo Vela, androidseb, jtcarnes, Gene Gotimer, Sami Ahmed Siddiqui, Karol Babioch, Eric Knibbe, Alexander Jaust, orviz, Lennart Jern, Benjamin Quorning, Ting Chen, Kai, adamroyjones, Bengt Lüers, JP Hastings-Spital, nbehrnd, iafelix, ColemanTom, Levente Polyak, Gunes Bayir, Mathieu Rul, Markus Lehtonen

MIT

Report bugs to and suggest improvements on the project page,
https://github.com/markdownlint/markdownlint

This is about markdownlint version 0.13.0 (October 2nd, 2023).

November 21, 2023