JavaScript Beautifier
Indent and tidy minified or hand-edited JavaScript in your browser, no upload.
Private by design. Every tool runs 100% in your browser — your code, text, and tokens never leave your device. Nothing is uploaded or stored.
A lightweight, dependency-free indenter for quick cleanup. For production-grade formatting (ASI, ASF, JSX), use Prettier in your pipeline — this tool is for fast in-browser tidying.
Formatted JavaScript appears here.
Frequently Asked Questions
Does beautifying change my code behavior?
No. Re-indenting and adding whitespace only affects formatting; the tokens and semantics are unchanged. Minified code becomes readable without altering what it does.
Should I beautify before or after editing?
Beautify first to see the structure, edit, then re-run if your editor does not auto-format. The change is purely cosmetic.
Can it handle ES modules and arrow functions?
Yes — modern JavaScript syntax including modules, arrow functions, and template literals is parsed and re-indented correctly.