JS
ValidateJavaScript

Validate JavaScript

Find & fix errors in JavaScript and JSX code

Settings

Benefits of Linting JavaScript

Catch Errors Early
Find fundamental errors before they make it to production. We all make them!
Prevent Bugs
Stop potentially destructive bugs before they cause real damage to your application.
Cleaner Code
Maintain safer, more readable, and maintainable code throughout your project.
Speed Up Development
Write code faster with confidence that common mistakes are caught automatically.
Save Debugging Time
Reduce hours of debugging by catching issues at the source before they cascade.

Popular ESLint Configurations

ESLint
Recommended defaults
Airbnb
Strict style guide
Google
Google style guide
Standard
No semicolons style

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.

The longer you work on a project, the larger your codebase will become. By validating your JavaScript code regularly you will catch fundamental errors, prevent potentially disastrous bugs, have cleaner, safer and maintainable code, speed up the code writing process, and save many hours of debugging.

ValidateJavaScript has been built using ESLint, the open-source JavaScript linting utility originally created by Nicholas C. Zakas. You can view the source code on GitHub.