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About This Tool
The JavaScript Beautifier & Minifier formats compact scripts into readable code lines or collapses whitespace to reduce file size.
Two-Way Code Modes: ā¢ Beautify JS: Inserts line breaks after structural braces and statement semicolons, expanding minified or one-line scripts into an indented format for easier reading and debugging. ā¢ Minify JS: Strips unnecessary spaces, tabs, and line returns around punctuation marks and operators, compressing the code into a compact single-line payload.
Practical Applications: ā¢ Code Inspection: Unpack minified third-party scripts or bundled library files to inspect variable names and function calls. ā¢ Quick Compression: Strip comments and excessive spacing from small utility scripts before pasting into bookmarklets or inline script blocks.
Execution & Privacy: Formatting and minification regex operations execute entirely inside your local browser runtime. Sensitive API keys, internal endpoints, and proprietary script logic are never transmitted across the network.
How to Use
- 1
Paste your JavaScript code into the left editor pane.
- 2
Click Beautify JS to insert line breaks after statements and braces, or Minify JS to collapse whitespace.
- 3
Inspect the transformed output in the right panel.
- 4
Copy the formatted or minified script directly to your clipboard.
Frequently Asked Questions
Does beautifying JavaScript alter code execution logic?
No. The beautifier adjusts whitespace and statement line returns without changing variable identifiers, operator order, or runtime behavior.
Does this tool support TypeScript or JSX syntax?
The tool performs regex-based whitespace transformations and can format basic TypeScript or JSX statements, though complex type annotations may benefit from a dedicated AST-aware compiler.
Is my source code sent to a remote server for formatting?
No. All string transformations run strictly in your web browser with local JavaScript.
Is there a file size limit for formatting?
Because processing runs in client memory, scripts up to several megabytes format almost instantly without network timeouts.