developer-tools
JavaScript Beautifier
Beautify JavaScript snippets online by normalizing indentation, line breaks, and common punctuation spacing while preserving strings, templates, comments, and regex literals.
Tool workspace
The interactive tool requires JavaScript.
Instructions
2. Click “Beautify JavaScript” to run browser-local closure checks and generate an indented result.
3. Review strings, template literals, regexes, comments, build-output syntax, and the target runtime before copying.
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.
JavaScript Beautifier turns compact scripts into a two-space indented reading draft and checks comments, quotes, template literals, regex literals, and brackets before returning output. It does not run code, load dependencies, parse source maps, minify code, or prove business logic is correct.
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.