JavaScript Beautifier

Beautify JavaScript online for free — turn minified or unindented code into clean, readable script instantly.

Overview

What is a JavaScript beautifier?

A JavaScript beautifier adds consistent indentation and line breaks after braces and semicolons, turning minified or unindented code into clean, readable script. This tool does so safely by tracking string and template literal boundaries, so nothing inside quotes is ever altered.

This is essential whenever you need to actually read a script — debugging unfamiliar code, reviewing a teammate's snippet, or inheriting a legacy file with inconsistent formatting all become far easier once the structure is visually clear.

Guide

How to use it

Three steps, no learning curve — paste, beautify, and copy the result.

Step 01

Paste your JavaScript

Drop minified or unindented script code straight into the input box.

Step 02

Beautify instantly

Proper indentation and line breaks are added the moment you paste — no button needed.

Step 03

Copy or download

Grab the formatted result instantly, or download it as a ready-to-edit .js file.

Tips

Best practices to keep in mind

A few habits worth keeping once you're working with formatted JavaScript.

Keep the beautified version for editing, and generate a minified version separately for production — the two serve different purposes and shouldn't be the same file.
Consistent indentation makes it far easier to spot a missing closing brace or an unexpected nesting level visually — beautifying minified JS before debugging often reveals the problem immediately.
When inheriting a legacy script with inconsistent formatting, beautifying it first standardizes the indentation, making future diffs and code reviews far easier to read for your whole team.
This is a bracket-based formatter, not a full syntax-aware pretty-printer — for very complex code with unusual patterns, spot-check the result before relying on it for a large codebase.

Comparison

SEOJuicer vs. other JS beautifiers

The same result, minus the uploads, the signup wall, and the paywall.

SEOJuicer

Runs entirely in your browser

Free, no signup required

String-aware, won't break URLs or regex

Preserves every variable & value

Unlimited input size

Other tools

Uploads your data to a server

Often requires an account

Can mangle strings or comments

Inconsistent nesting handling

Capped or paywalled

FAQs

Frequently asked questions

Have questions about beautifying JavaScript? Here are the most common ones our users ask before getting started.

Is this JavaScript beautifier free to use?

Yes, the JavaScript beautifier is completely free with no signup, no usage limits, and no watermarks on the output. It runs entirely in your browser, so there are no server costs passed on to you and no account is ever required to format your script.

Does my JavaScript code get uploaded to a server?

No. All formatting happens locally in your browser using JavaScript — your code never leaves your device or gets transmitted to any server. This makes the tool safe to use with internal logic, unreleased features, or proprietary algorithms.

What does beautifying JavaScript actually do?

Beautifying adds a new line and consistent indentation after every opening brace, closing brace, and semicolon, while carefully skipping over string and template literal contents so nothing inside quotes is altered. Variable names and logic are preserved exactly as written.

Why would I beautify minified JavaScript?

Minified JavaScript is optimized for file size, not readability, which makes it nearly impossible to debug or understand by hand. Beautifying restores line breaks and indentation so you can quickly trace through logic, find a specific function, or understand how a script is structured before making changes.

Will beautifying change how my JavaScript runs?

No — beautifying only adds whitespace and line breaks around statements, none of which affects how JavaScript is executed. Variable names, logic, and behavior stay exactly the same, so the script runs identically before and after formatting.

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