Local browser processing
JavaScript Beautifier
Format compact JavaScript into structured, indented code with string-aware spacing and brace indentation.
How to use JavaScript Beautifier
- 1Paste JavaScript into the editor.
- 2Select your preferred indentation style.
- 3Format the code and copy the cleaned result.
Key features & capabilities
2-space, 4-space, or tab indentation
String-aware brace and statement formatting
Works entirely in the browser
Useful for compressed or hard-to-read snippets
Frequently Asked Questions
Is this a full JavaScript parser?No. It is a lightweight formatter intended for common JavaScript source; it does not attempt to replace a full AST-based formatter such as Prettier.
Will it execute my JavaScript?No. The formatter treats your source as text and does not execute the input code.
Is my source uploaded?No. Formatting happens in the browser on the current device.
About this tool
JavaScript Beautifier is designed for practical everyday workflows. The interface is intentionally lightweight, responsive, and usable on desktop and mobile. The conversion or calculation runs in your browser, so ordinary input data is processed on the current device rather than uploaded as part of the tool operation.