JSLint - Describes problems in code with an approximate location within the source. JSHint - Helps to detect errors and potential problems in code. es-analysis/plato - Source code visualization, static analysis, and complexity tool. JavaScript Lint - Code checker that finds common mistakes in scripts. Check syntax and warns against questionable practices. ESLint - Its goal is to provide a pluggable linting utility. Krasota.js - Syntactic transformations of code, taking care of white spaces and comments. jQuery Lint - A runtime reporter. Runs on top of jQuery, aims to report errors and any incorrect usage.