JavaScript Beautifier
Runs in your browser — your data is never uploaded.
Reformat minified or unindented JavaScript into clean, readable code with consistent indentation — useful for reading minified bundles or third-party scripts. Runs entirely in your browser.
0 characters · runs entirely in your browser
How to use JavaScript Beautifier
- 1
Paste your JavaScript into the box.
- 2
Choose an indent style.
- 3
Click “Beautify”, then copy or download the result.
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Frequently asked questions
Does beautifying change how the code runs?+
No — it only adds whitespace, indentation and line breaks. The logic, variable names and execution order are untouched, so the beautified script behaves exactly like the original.
Can it handle modern JavaScript?+
Yes — it reformats standard JavaScript, including ES modules and modern syntax, reliably. Framework-specific extensions like JSX may not indent perfectly, since the beautifier targets plain JavaScript rather than a full compiler.
Can this “unminify” mangled variable names?+
It reformats structure and indentation, but it can’t recover the original variable names — those are permanently lost once a minifier mangles them. The logic and behavior of the code stay identical either way.
Is my code uploaded anywhere?+
No. Formatting runs entirely in your browser — nothing is sent to a server.