JavaScript Formatter

What is a JavaScript Formatter?

A JavaScript formatter, or beautifier, takes minified or inconsistently written JavaScript and reformats it with proper indentation, consistent spacing, and clear line breaks so the code becomes readable again. It is the inverse of minification — instead of compressing code for machines, it expands it for humans.

Our JavaScript Formatter uses a well-established beautification engine that understands JavaScript syntax — functions, arrow functions, objects, arrays, control flow, and more — producing clean, predictable output with the indentation style you choose.

How to Format JavaScript

• Paste your JavaScript, or click Sample to load an example
• Choose 2 spaces, 4 spaces, or tabs for indentation
• The beautified, properly indented code appears instantly
• Statements, blocks, and nested structures are laid out for readability
• Click Copy to copy the formatted code to your clipboard

Why Format JavaScript?

The most common reason is to make minified or compressed JavaScript readable — for example, when debugging a production bundle, studying a third-party library, or recovering code that lost its formatting. A beautifier restores structure so you can understand what the code actually does.

Developers also use it to standardize inconsistent code, clean up snippets copied from various sources, and produce tidy examples for documentation. Consistent formatting reduces cognitive load and makes bugs easier to spot.

Privacy

Formatting runs entirely in your browser, so your JavaScript — including proprietary or unreleased code — is never transmitted to any server. It is completely safe to beautify sensitive code with this tool.