JS Formatter
When you need to format source code or structured data with the controls provided, JS Formatter gives you a browser-based workflow with a visible input, primary action, and formatted, readable output.
How to Use JS Formatter
- Prepare source code or structured data and enter or select source code or structured data in the workspace.
- Review the available options, then choose Format / Beautify to run the task.
- Inspect formatted, readable output, compare it with the source and selected settings, and save or copy it only after it meets your requirements.
What Is the JS Formatter?
The JS Formatter is a free online utility that helps you format and organize JavaScript code for easier reading and debugging. It provides a focused workspace for web developers, software engineers, students, and technical writers.
Use this formatter when you need cleaner source text for code review, debugging, documentation, or a pull request. The current interface gives you JS Input, Output, 2 spaces so the task can be completed without navigating away from the page.
Key features
- Format / Beautify
- Minify
- Validate Only
- JS Input
- Output
- 2 spaces
When to Use This Tool
- Quick one-off tasks using the JS Formatter without setting up a separate desktop utility.
- Checking or preparing data while debugging, documenting, publishing, or testing a workflow.
- Creating a clean result that can be copied, downloaded, or transferred into another application.
Tips for better results
- Validate the source before assuming formatting can repair syntax errors.
- Choose an indentation style that matches the project you will paste the result into.
- Review the formatted result before replacing production code or configuration files.
JS Formatter Example
Paste a minimal valid sample into source code or structured data, run JS Formatter, and test the formatted, readable output in the target application before using it with a larger production payload.
Frequently Asked Questions
Which input works best in JS Formatter?
Provide source code or structured data. When available, complete the labeled controls with representative, correctly formatted values before running the primary action.
How do I verify the output from JS Formatter?
Review formatted, readable output for completeness and compare it with the original input, selected options, and the requirements of the application where you will use it.
Can I use the JS Formatter output in production without testing it?
Validate the output with the target runtime, parser, specification, or test suite before using it in production.