JSON Beautifier

JS Formatter – Beautify & Format JavaScript Online

Use this free js formatter to clean up messy code, fix indentation, and format JavaScript online in seconds. Paste your script, click a button, and this online javascript formatter outputs pretty, readable code that’s easier to debug, review, and share.

Whether you’re quickly reviewing a minified snippet, debugging third‑party code, or enforcing code style, this javascript code formatter works as a reliable jsbeautifier online tool for everyday development.

What the Online JS Formatter Does

The CodersTool js formatter online is designed to:

• Beautify JavaScript online – Re-indent and space your code so it’s easy to read.
• Normalize style – Turn inconsistent tabs, spaces, and line breaks into a consistent, clean layout.
• Un-minify JS – Take compressed one-line scripts and run them through an online js beautifier to get human-friendly code back.
• Handle modern syntax – Works as a practical javascript code formatter online for ES6+ features like arrow functions, imports, async/await, and more.

Think of it as a fast, browser-based js code formatter that you can open from anywhere—no editor plugin or local setup required.

How to Format JavaScript Code Online

1. Paste or type your JS

1. Copy your JavaScript from your editor, browser console, or log file.
2. Paste it into the input area of the online js code formatter.
3. You can also drag-and-drop a js file formatter target file if the page supports file upload.

2. Click “Format JS”

1. Click the button to format js online.
2. The tool parses your code and runs it through the js online beautifier logic.
3. In a second, you’ll see neatly formatted, properly indented JavaScript.

3. Copy the result

1. Copy the formatted output from the javascript formatter online window.
2. Paste it back into your editor, repository, or snippet manager.
3. Use it as your new, readable source of truth.

Why Use a JavaScript Code Formatter?

Even with a good editor, there are many times when an online javascript formatter is faster and more convenient:

• Shared machines & locked-down environments – No plugins? Use this javascript online beautifier in the browser.
• Code review & debugging – Quickly prettify js online from logs, browser dev tools, or third‑party snippets.
• Consistent style – Normalize indentation and spacing when you can’t change the project’s build tooling.
• Learning & teaching – Students can format javascript code online and immediately see a clean version of complex examples.

Instead of manually lining up braces and fixing indentation, let this js beautifier online do the work for you.

Features of the JS Formatter

• Supports modern JavaScript – ES modules, classes, template literals, and more.
• Optional settings – Choose your indent size, tab vs spaces, or line width (depending on the UI).
• Safe formatting – Aims to preserve the original logic while only changing layout and whitespace.
• Browser-based – All formatting happens right in your browser; no need to upload source code to a remote server.

Example – Before and After

Messy JavaScript

function sum(a,b){if(!a)return 0;return a+b}

Formatted with the JS Code Formatter

function sum(a, b) {
  if (!a) return 0;
  return a + b;
}

In one click, the format js code online engine turns compressed, hard-to-read code into something you can confidently maintain.

Related Developer Tools on CodersTool

• JS Minifier – Compress formatted JS for production.
• JSON Formatter – Pretty-print JSON responses and configs.
• CSS Formatter – Clean up and standardize your CSS files.
• HTML Formatter – Re-indent and tidy HTML templates.

Bookmark this page and use the js formatter online whenever you need to quickly clean up JavaScript code without changing its behavior.