Free online JavaScript beautifier
Pretty-print and format JavaScript online for free. Paste minified or messy JS, tune indent and wrap options, then beautify privately in your browser - nothing uploaded.
What you can do
Pretty-print JS
Beautify minified or dense JavaScript into readable indentation and line breaks - free and online.
Tunable options
Set indent (spaces or tabs), brace style, wrap length, and more. Preferences stay in your browser.
Private by default
Format JavaScript online without uploading. Everything runs locally on your device.
How to beautify JavaScript online
- Paste your JavaScript (or click Sample).
- Adjust indent, brace style, and wrap options if you want.
- Click Beautify, or press Ctrl+Enter / Cmd+Enter to format quickly.
- Copy the readable output - or minify later with the related tools below.
Frequently asked questions
Learn more
Related tools: JS Minifier, JS Linter, Regex tester.
Why beautify JavaScript online locally?
Minified bundles and one-line scripts are hard to debug. A free online JavaScript beautifier restores structure on your device so you can read, review, and edit without pasting proprietary code into an upload-based formatter.