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JavaScript Formatter
JavaScript Formatter
Clean, organize and beautify your JS code instantly
JS PRO
Formatted Output
Source (Minified/Messy)
Beautified Result
About the JavaScript Formatter
Format JavaScript with your preferred indentation, braces, quotes and semicolons.
How to use the JavaScript Formatter
- Paste your code into the input box, or click Sample to load an example.
- Choose the Indentation (2, 4 or 8 spaces), Brace Style (Collapse, Expand or End Expand), Quote Style and Semicolons.
- Optionally tick Break Chained Methods or Comma First Style.
- Press Beautify & Format JavaScript.
- Use Copy (or Download where shown) to keep the result. Clear empties the box.
When to use the JavaScript Formatter
- Making minified or copy-pasted code readable so you can understand what it does.
- Applying one indentation and brace style to code written by several people.
- Cleaning up snippets before you paste them into documentation or a bug report.
- Preparing code for a review by giving it a consistent layout.
Common mistakes to avoid
- Debating style instead of agreeing on one. Pick the settings your team uses and stick with them.
- Formatting a file and mixing the style changes with real changes in a single commit, which makes the review harder.
- Expecting a formatter to fix errors. It lays out valid code and cannot repair a broken script.
Tips
- Follow your team's style guide so all code looks the same.
- Two spaces is the most common indentation in JavaScript projects.
- Use the same quote style everywhere, either single or double quotes.
Frequently Asked Questions
Collapse (K&R) is the most common in JavaScript.
A formatter changes the appearance of the code. A linter checks it for likely bugs and bad practice. They complement each other.
Either style works if you use it consistently. Many teams use semicolons because they avoid a few rare edge cases.
A less common style that puts commas at the start of each line in lists and objects, so a missing comma is easy to spot.