grunt-jsonlint is a Grunt plugin that validates JSON files using jsonlint. It helps automate JSON syntax checking as part of your build process, ensuring data integrity. Features include configuring validation options, ignoring specific files, and reporting errors in a clear, concise manner. Integrating grunt-jsonlint allows you to catch JSON errors early, preventing potential issues in your application. This enhances code quality by automating the JSON verification process, allowing for more reliable and predictable data.