01
Paste your JavaScript
Drop in minified, compressed, or messy JavaScript copied from a bundle, console, or code editor.
JavaScript Beautifier Online
Beautify, format, and decompress minified or messy JavaScript code snippets instantly. Custom spacing options with 100% local client-side execution.
Developer Tool
JavaScript Beautifier Online
Spacing:
Beautified Output
100% Secure & Private
Processed locally in your browser. No data is sent to our servers.
How to use
Use this js code formatter in three simple steps
Our workflow is designed to be straightforward, allowing you to complete your task in seconds.
02
Pick your indentation
Choose 2-space or 4-space indentation to match your team's style guide or project conventions.
03
Copy the clean code
Grab the neatly indented output and paste it back into your editor for easier reading and debugging.
Prettier Format
Restores messy JS logic into a highly readable structure.
Custom Indents
Choose between 2 spaces, 4 spaces, or classic tab alignments.
Syntax Highlighting
Makes reviewing the beautified code exceptionally easy.
Offline Processing
Your source code and proprietary algorithms remain private.
Use cases
Useful for different workflows
Code Reviews
Format minified code packages to inspect functionality.
Script Debugging
Beautify compressed console scripts to identify syntax errors.
Learning & Auditing
Analyze compiled JS scripts in a human-readable indentation.
Tool guide
Why Beautify JavaScript?
In production systems, JavaScript is typically minified to strip comments, whitespaces, and compress parameters to load websites faster. However, this makes the code impossible for human engineers to read or debug. A JavaScript beautifier restores the styling layouts, indentations, and structure to make the code readable.
How Our Formatting Engine Works
The engine works by identifying syntax boundaries (such as curly braces, semicolons, and operators). It maps tokens into a linear array, strips legacy unneeded margins, and builds new indentation margins based on open and closed brackets.
How to Beautify JS Online
Paste your code block, configure your indent spacing preference (2 or 4 spaces), and copy the formatted script. Everything is processed locally in the client thread to protect your code privacy.
FAQ
Frequently asked questions
Will beautifying JavaScript break my code?
No. The formatting engine only alters structural metadata like whitespace spacing, indent tabs, block newlines, and semicolon layouts. It never alters function declarations, variable names, or execution paths.
Can I copy private scripts into this tool?
Yes. The code you input remains entirely inside your browser tab's RAM space. No data is stored, cookies are not logged, and code strings are not transmitted, guaranteeing absolute code privacy.
Can it format TypeScript or JSON?
For JSON files, we recommend using our specialized JSON Formatter tool. For simple TypeScript scripts, this beautifier will format basic statements, bracket layers, and declarations correctly.
Does this tool also minify JavaScript?
This beautifier focuses on expanding code for readability. To shrink code for production, use a dedicated minifier after you finish editing.
Will it fix syntax errors in my JavaScript?
No. The beautifier reformats spacing and indentation but does not repair broken syntax. Malformed code may not indent as expected until the errors are fixed.
From our blog
Make Ugly JavaScript Readable Again
Read the full guide behind the JavaScript Beautifier Online and get the most out of it.
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