Skip to main content

A linter for YAML files.

Project description

A linter for YAML files.

yamllint does not only check for syntax validity, but for weirdnesses like key repetition and cosmetic problems such as lines length, trailing spaces, indentation, etc.

CI tests status Code coverage status Documentation status

Written in Python (compatible with Python 3 only).




yamllint screenshot


Using pip, the Python package manager:

pip install --user yamllint

yamllint is also packaged for all major operating systems, see installation examples (dnf, apt-get…) in the documentation.


# Lint one or more files
yamllint my_file.yml my_other_file.yaml ...
# Lint all YAML files in a directory
yamllint .
# Use a pre-defined lint configuration
yamllint -d relaxed file.yaml

# Use a custom lint configuration
yamllint -c /path/to/myconfig file-to-lint.yaml
# Output a parsable format (for syntax checking in editors like Vim, emacs...)
yamllint -f parsable file.yaml

Read more in the complete documentation!


Here is a yamllint configuration file example:

extends: default

  # 80 chars should be enough, but don't fail if a line is longer
    max: 80
    level: warning

  # don't bother me with this rule
  indentation: disable

Within a YAML file, special comments can be used to disable checks for a single line:

This line is waaaaaaaaaay too long  # yamllint disable-line

or for a whole block:

# yamllint disable rule:colons
- Lorem       : ipsum
  dolor       : sit amet,
  consectetur : adipiscing elit
# yamllint enable

Specific files can be ignored (totally or for some rules only) using a .gitignore-style pattern:

# For all rules
ignore: |

    ignore: |
    ignore: |

Read more in the complete documentation!


GPL version 3

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

yamllint-1.33.0.tar.gz (130.4 kB view hashes)

Uploaded source

Built Distribution

yamllint-1.33.0-py3-none-any.whl (65.4 kB view hashes)

Uploaded py3

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page