About this tool
JavaScript Beautifier — Format minified or messy JavaScript with sane defaults. Free, fast and private. Runs entirely in your browser at Quick Calci Tools.
Examples
Common scenarios for the JavaScript Beautifier.
Bundled one-liner
- code
- function a(){return 1+2}export{a}
Expanded blocks with readable return expression.
Template literals
- code
- const x=`hi ${name}`
Backtick sections stay intact without breaking nesting.
Arrow chains
- code
- const f=x=>y=>x+y
Optional parentheses clarified per formatter defaults.
Who uses the JavaScript Beautifier?
Common scenarios and audiences for this tool.
Security reviewers
Walk obfuscated dropper-looking drops under readable layout.
Interviewers
Share cleaned snippets without horizontal scroll.
Students
Unpack minified tutorial downloads step by step.
Extension devs
Study third-party content-script builds.
Technical debt sprints
Onboard teammates to crusty legacy widgets quickly.
Frequently asked questions
Everything you need to know about the JavaScript Beautifier.