JS Formatter

JavaScript is the core language of the web, and its efficient delivery is critical for performance. Our JS Formatter is a specialized tool designed to transform messy, single-line JavaScript strings into beautifully indented, human-readable structures. It doesn't just add whitespace; it intelligently parses the code to ensure it follows the strict JavaScript specification. The tool handles everything from basic functions to deeply nested objects and arrays, providing a clear visual hierarchy that helps you understand the code structure at a glance. It also includes a real-time validator that catches common syntax errors, which are frequent sources of bugs in web development. By using this tool, you can quickly inspect third-party scripts, verify configuration files, and ensure your code is perfectly formatted before using it in your applications.

Paste your minified or messy JavaScript code into the editor. Click "Format" to prettify it with consistent indentation and spacing. The tool also validates your code and highlights any syntax errors.

For developers, time is the most valuable resource. Manually formatting a 500-line script to find a specific nested property is a waste of that resource. Our JS Formatter provides instant clarity, allowing you to debug faster and with more confidence. It's particularly useful when working with minified scripts, where code is often returned in a compact format to save bandwidth. Beyond simple readability, the built-in validation is a lifesaver. It prevents the frustration of 'Unexpected token' errors in your code by identifying exactly where a script is malformed. Furthermore, because this tool runs entirely in your browser, your code is never sent to a server. This makes it a secure choice for formatting sensitive information like API keys, user data, or internal configurations. It's a lightweight, high-performance utility that fits perfectly into any developer's daily workflow, whether you're a frontend engineer inspecting state or a backend developer verifying database exports.