JavaScript Beautifier Guide: Brace-Based Indentation
Learn how tracking brace depth turns flat code into readable blocks, and where the simple approach stops.
What is the JavaScript Beautifier?
This tool protects quoted strings first, then breaks code after braces and semicolons and indents each brace level by two spaces. It is deliberately basic: it does not understand every JavaScript construct, so object literals, arrow functions and complex expressions may indent less neatly than a full formatter would. Use it to make short, straightforward scripts readable, and a dedicated formatter for large codebases.
How to use it
- Paste your JavaScript into the box.
- Click Beautify JavaScript.
- Read the indented code.
Worked example
For the sample, the function opens on its own line, the if block is indented inside it, both return statements sit at their correct levels, and the closing braces align with their openers.
Why not use this for a large project?
Because a basic formatter cannot know every language rule. Large codebases deserve a dedicated formatter that parses the language properly.
Frequently asked questions
Does it format complex code perfectly?
No. It is a basic brace-based formatter, so object literals and unusual expressions may not indent as a full formatter would.
Are strings protected?
Yes. Quoted and template strings are set aside before braces and semicolons are split, so braces inside a string do not change the indent.