On the fly syntax checking for GNU Emacs https://www.flycheck.org
  • Emacs Lisp 97.9%
  • Makefile 0.4%
  • Rust 0.2%
  • Erlang 0.2%
  • Go 0.1%
  • Other 0.1%
Find a file
Bozhidar Batsov 96f1852c7e Add asciidoc-mode support to AsciiDoc checkers
asciidoc-mode (https://github.com/bbatsov/asciidoc-mode) is now
recognized by the asciidoctor and textlint checkers, alongside the
existing adoc-mode.
2026-06-04 23:02:56 +03:00
.github Convert issue templates to YAML issue forms 2026-03-05 12:17:07 +02:00
doc Update docs for removed Go options and new phpcs-changed option 2026-02-23 14:31:58 +02:00
test [Fix #2170] Use LC_MESSAGES=C instead of LC_ALL=C for checkers 2026-06-01 14:15:14 +03:00
.flake8 Fix flake8 warnings 2018-10-29 10:17:41 +01:00
.gitignore Replace pkg-info with package-get-version (#2037) 2024-02-13 11:14:52 +02:00
.mailmap Update mailmap to fix names in git log 2016-08-18 08:21:17 +02:00
.readthedocs.yaml Update ReadTheDocs build to Python 3.13 2026-02-22 10:29:10 +02:00
CHANGES.old Split old changelog into separate file 2016-04-05 16:16:21 +02:00
CHANGES.rst Add asciidoc-mode support to AsciiDoc checkers 2026-06-04 23:02:56 +03:00
COPYING Re-license as GPL 3 2012-12-30 10:46:07 +01:00
Eask Release 36.0 2026-02-19 14:25:32 +02:00
flycheck-buttercup.el Improve docstrings: fix errors and add missing documentation 2026-02-13 17:52:58 +02:00
flycheck.el Add asciidoc-mode support to AsciiDoc checkers 2026-06-04 23:02:56 +03:00
flycheck.svg [Fix #331] Add logo for Flycheck 2014-06-06 14:37:22 +02:00
MAINTAINERS Add myself to the list of the maintainers 2024-02-04 18:57:48 +02:00
Makefile Remove obsolete maint/ directory and references 2026-02-22 11:21:17 +02:00
README.md Remove Gitter references from docs and README 2026-02-22 11:46:56 +02:00

Flycheck

License GPL 3 MELPA MELPA stable version NonGNU ELPA CI Docs

https://www.flycheck.org

Modern on-the-fly syntax checking extension for GNU Emacs. Try it!

Getting Started

Flycheck is available for installation with package.el on NonGNU ELPA, MELPA Stable and MELPA.

You can install Flycheck with the following command:

M-x package-install [RET] flycheck [RET]

Finally add this to your Emacs config:

(global-flycheck-mode +1)

Alternatively, if you're into use-package you can do the following:

(use-package flycheck
  :ensure t
  :config
  (add-hook 'after-init-hook #'global-flycheck-mode))

Now you can start using any of the bundled checkers or install additional checkers.

For a more gentle introduction read the Installation instructions and go through Quickstart guide.

Getting Help

Please ask questions about Flycheck on Stack Exchange and report bugs to our issue tracker.

Contributing

We welcome all kinds of contributions, whether you write patches, open pull requests, write documentation, help others with Flycheck issues, or just tell other people about your experiences with Flycheck. Please take a look at our Contributors Guide for help and guidance about contributing to Flycheck.

Sponsoring

You can support financially the development of Flycheck and related packages via:

Open Collective Backers

Open Collective Sponsors

Become a sponsor and get your logo on our README on Github with a link to your site. [Become a sponsor]

Code of Conduct

We strive to create a safe, friendly and welcoming environment in the Flycheck community and have a Code of Conduct that defines acceptable and welcome behaviour as well as sanctions for violations. All contributors and all participants are expected to follow it, on Github, Emacs.SX or any other place thats part of Flychecks broader community.

License

Flycheck is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

Flycheck is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.