JavaScript Beautifier

Turn minified or hard-to-scan JavaScript into readable code with proper indentation before debugging, reviewing, or sharing it. Useful for bundle inspection, pasted snippets, and legacy code cleanup.

Indent:

Input JavaScript151 B

Client-Side Processing

Input Data Stays on Device

Instant Local Execution

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What is JavaScript Beautifier?

JavaScript beautification restructures compressed, messy, or inconsistently formatted code into a layout that is easier to read line by line. That matters when you are trying to understand control flow, inspect function calls, trace a bug inside a bundle, or review a snippet copied from a browser or third-party source.

The tool is especially helpful when the code is technically valid but painful to scan. Beautifying does not change the logic. It changes spacing, indentation, and line breaks so the same JavaScript becomes easier to discuss, document, or investigate.

How to Use JavaScript Beautifier

Paste your minified or messy JavaScript code

Choose indentation style (spaces or tabs)

Select indentation size (2 or 4 spaces)

Click "Beautify" to format the code

Copy or download the formatted result

Common Use Cases

Frontend developers opening minified bundle fragments to understand what a production error is touching.
Engineers cleaning up pasted JavaScript before sharing it in a pull request, bug report, or incident doc.
Teams reviewing legacy scripts that were written without consistent formatting rules.
Developers inspecting third-party snippets before embedding them into a site or app.
Educators and technical writers turning rough sample code into something readable for documentation.

Example Input and Output

A compressed snippet becomes much easier to debug once blocks, conditions, and returns are split onto separate lines.

Minified JavaScript

function track(evt){if(!evt||!evt.type)return;const payload={type:evt.type,ts:Date.now(),source:"checkout"};sendEvent(payload);return payload}

Beautified JavaScript

function track(evt) {
  if (!evt || !evt.type) return;

  const payload = {
    type: evt.type,
    ts: Date.now(),
    source: "checkout"
  };

  sendEvent(payload);
  return payload;
}

Privacy

Use browser-side beautification when the code includes internal endpoints, feature flags, or snippets that should stay off shared servers.

Workflow tip

Beautify first, then move into Regex Visualizer or Code to Image if you need deeper inspection or a shareable screenshot for a report or tutorial.

Frequently Asked Questions

Will beautifying change my code behavior?

No, beautification only changes whitespace and formatting. The logic and functionality remain exactly the same.

Should I beautify code for production?

No, for production you should minify code for better performance. Beautified code is for development and debugging.

Can it format ES6+ syntax?

Yes! Our beautifier supports modern JavaScript including arrow functions, destructuring, async/await, and more.

Is my code uploaded to a server?

No. Beautification runs in the browser, which is useful when the snippet contains internal logic, environment names, or code that should stay local while you inspect it.

When should I use this instead of a linter or formatter in my editor?

Use it when you need a quick one-off cleanup in the browser, especially for pasted snippets, minified output, or code from a machine where your normal editor setup is not available.

Can this help with minified third-party scripts?

Yes. Beautifying is one of the fastest ways to make compressed vendor code readable enough to inspect event handlers, network calls, or suspicious logic during debugging.