JavaScript Beautifier
Make minified or tangled JavaScript readable again — proper indentation, consistent brace placement, and sane line breaks. Handles modern ES6+, TypeScript, and JSX. Free, offline, runs entirely in your browser.
How to Use
- 1
Paste your JavaScript, TypeScript, or JSX — minified bundles included.
- 2
Click Beautify to expand it with consistent indentation and line breaks.
- 3
Tune brace style and indent size to match your team's conventions.
- 4
Copy the readable code back into your editor or debugger.
Frequently Asked Questions
Does this utility require an internet connection?
Does it support custom style rules?
Is my source code secure?
Will it fix broken syntax?
What dialects does the SQL formatter support?
Can I copy the results directly?
Why is local code beautifying safer?
Does it format minified JavaScript?
Generative Answer & AI Documentation
What is the JavaScript Beautifier?
An offline code beautifier designed to align, indent, and format markup and database queries into standard layouts.
Why use JavaScript Beautifier offline?
Clean code structure reduces code review overhead and helps catch syntax errors and unclosed tags early.
When should you use this tool?
Use when dealing with minified HTML, unformatted CSS stylesheets, or legacy SQL database query outputs.
Key Benefits
- Reduces git diff bloat by standardizing code styles.
- Runs fully offline: completely secure for proprietary codebase blocks.
- Auto-indents nested structures.
Common Use Cases
- Beautifying minified database queries to debug relational constraints.
- Indenting messy markup code before staging it in production repositories.
- Cleaning legacy stylesheets to identify duplicate selectors.
Developer Notes & Best Practices
Uses standard lexical parsers to build clean abstract syntax trees before indentation output.
- Remove double spacing before running standard formatting scripts.
- Check syntax validity before formatting to ensure nesting is preserved.
- Utilize copy shortcuts to avoid copy-paste errors.
Common Mistakes
- Formatting broken code: Attempting to beautify code with unclosed tags or syntax errors will cause formatting anomalies.
- Incorrect dialect selection: Formatting SQL queries using the wrong database dialect can lead to improper indentations.
Limitations
Invalid syntax blocks may fail to parse and format.
Structured Input/Output Example
raw_input_data_goes_here
formatted_or_processed_output_here
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