About ValidateJavaScript

ValidateJavaScript is an online validating (or linting) tool that will automatically find basic errors and help prevent potentially destructive bugs in JavaScript and JSX (React.js) code. Copy and paste or directly input your code into the editor above, click the 'Find & Fix Errors' button, and the tool will parse your code and list all errors allowing you to fix them systematically.

Benefits of Linting JavaScript

The longer you work on a project, the larger your codebase will become, so by validating your JavaScript code regularly you will be able to:


ValidateJavaScript has been built using ESLint, the open-source JavaScript linting utility created by Nicholas C. Zakas, and is being maintained by CircleCell. You can download the ValidateJavaScript source code on GitHub.