Skip to main content
Formatza
All Tools
Back to all tools

JavaScript Beautifier

Beautify JavaScript code for easier review.

1
Upload
2
Configure
3
Convert
4
Download

Beautify JavaScript code for easier review.

Choose a file to get started
Drag and drop a supported file here, or press Enter to browse your device.

Related tools

Ready tools are shown first.

JSON Formatter

Format JSON data for easier reading.

JSON Validator

Validate JSON syntax and structure.

JSON Minifier

Minify JSON data to reduce size.

JSON Beautifier

Beautify JSON data with readable formatting.

JSON to CSV

Convert JSON data to CSV format.

CSV to JSON

Convert CSV data to JSON format.

Tool guide

JavaScript Beautifier Online

Beautify JavaScript code with readable indentation in your browser. The tool does not execute user code and is intended for quick cleanup.

Steps

How it works

  • Paste JavaScript.
  • Choose indentation.
  • Beautify the code.
  • Copy or download the .js output.
Highlights

Key features

  • Adds basic indentation and line breaks.
  • Supports 2-space and 4-space indentation.
  • Does not execute JavaScript.
  • Useful for quick readability improvements.
Use cases

Common uses

  • Review compact snippets.
  • Clean copied JavaScript.
  • Prepare examples for documentation.
Notes

Limitations to know

  • This is not a full AST-based formatter.
  • Modern or unusual syntax may need manual cleanup.
  • It does not lint or validate code behavior.
FAQ

Frequently asked questions

3 answers

Does this run my JavaScript?

No. Input is transformed as text only.

Is it the same as Prettier?

No. It is a lightweight browser formatter for quick cleanup.

Can I download the output?

Yes. Download the beautified JavaScript after processing.