Free Online JavaScript Beautifier
Minified or obfuscated JavaScript code is unreadable due to stripped indentation and compressed line breaks.
Our free online JavaScript Beautifier restructures compressed JS scripts into clean, readable code with customizable indentation. Effortlessly inspect third-party web scripts, debug minified production files, and standardise JavaScript formatting.
Key Features of Our Online JavaScript Beautifier
Instant Un-minification
Reconstructs line breaks and structural indentation from single-line scripts.
Custom Indentation
Format output with 2-space or 4-space indent levels.
File & URL Import
Upload local `.js` files or fetch external scripts directly via public URL.
100% Client-Side Privacy
Code processing happens locally inside your browser memory without server uploads.
How to Use the JavaScript Beautifier
- Paste minified or unformatted JavaScript into the Input text area.
- Click "Beautify (2 Spaces)" or "Beautify (4 Spaces)" to run the formatter.
- Copy or download the clean JavaScript output directly.
Frequently Asked Questions (FAQs)
Does beautifying JavaScript alter function logic?
No. Beautification only modifies whitespace and line structure without changing code execution or variable names.
Can I upload large JS bundle files?
Yes, as long as your browser memory allows, client-side processing can format multi-thousand line files.