Beautify minified or tangled JavaScript with 2-space, 4-space, or tab indent and optional semicolons. Free online JS formatter — private, no file upload.
0 characters
100% browser-based
Runs locally in this tab
No upload required
Your files never leave this device
Nothing is stored
Close the tab and the input is gone
Instant results
No queue and no server wait
Paste a compressed script from a page source or a one-line snippet and get indented functions again. Nested blocks and calls pick up a consistent structure so you can read someone else’s bookmarklet or a vendor file you cannot pretty-print in the IDE yet.
Match the project style instead of introducing a second indent in a paste. Change the setting and the same input is reformatted immediately.
Turn on insert semicolons when you want ASI-sensitive code to look explicit. Leave it off if the file is written in a no-semicolon style. Pair it with max-depth and function counts to see how dense the script is.
Source never uploads. Unpublished logic and hardcoded URLs remain on the device. No account required.
Minified production JS, a copied function, or a messy snippet all work. You do not upload a file.
Choose 2 spaces, 4 spaces, or tabs. Enable insert semicolons if you want them added where the formatter can do so safely.
Stats tell you how nested the script is after it becomes readable. Deep trees are harder to review — now you can see them.
Copy the output into your editor. This is a beautifier, not a bundler — nothing is stored on a server.
Straight answers on privacy, limits, and how the workspace behaves.
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