JavaScript Beautifier
Beautify JavaScript snippets online by normalizing indentation, line breaks, and common punctuation spacing while preserving strings, templates, comments, and regex literals.
Paste compact, copied, or hard-to-read JavaScript and generate a more readable version for review, documentation, or debugging notes. The tool performs browser-local scanning and formatting only; it never executes pasted JavaScript.
Browser-local processing
JavaScript Beautifier
How to use
Finish in three steps
- 01
Paste a JavaScript function, config script, console snippet, or documentation example into the input box.
- 02
Click “Beautify JavaScript” to run browser-local closure checks and generate an indented result.
- 03
Review strings, template literals, regexes, comments, build-output syntax, and the target runtime before copying.
What this tool changes
The tool splits compact JavaScript around blocks, semicolons, and comments, applies two-space indentation, and preserves string, template, regex, and comment text as data.
Why it never executes code
Beautifying only requires reading characters and printing layout. The implementation does not use eval, Function, imports, network requests, script tags, or dependency execution.
Scope boundaries
Use it for reading and first-pass cleanup, not as a replacement for ESLint, Prettier, Babel, TypeScript, bundlers, or security review. Complex modern syntax and minified build output still need project tooling.
FAQ
About this tool
Does JavaScript Beautifier run pasted code?
No. It performs browser-local lexical scanning and layout only. It does not call eval, Function, script tags, external APIs, or build services.
Can it replace Prettier?
No. It is useful for quick snippet readability. Team formatting, AST-level syntax support, and project configuration should remain in Prettier or your project formatter.
Can beautifying change JavaScript behavior?
The goal is layout-only output, but review regexes, template literals, automatic semicolon insertion, obfuscated code, and generated bundles before using the result.
Can I paste private production scripts?
Avoid it. Processing is browser-local, but browser extensions, clipboard history, device state, and accidental sharing can still create risk.
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