Developer Tools
JavaScript Minifier
Compress and optimize JavaScript code to reduce file size and improve loading speeds.
JavaScript Beautifier
A 100% client-side JavaScript beautifier powered by Prettier. Instantly reformat minified, obfuscated, or messy JS code into a clean, properly indented, and highly readable style. Supports ES6+ syntax including arrow functions, classes, async/await, and modules. Customize indentation and quote styles effortlessly.
Original Lines 0
Beautified Lines 0
What is the JavaScript Beautifier?
The FreeTechLearner JavaScript Beautifier takes unreadable, minified, or messy JavaScript code and instantly parses it into beautifully formatted, properly indented, and perfectly spaced blocks. It acts as the exact reverse of a JavaScript Minifier, making code readable for debugging and learning.
How to Use
- Paste your messy or minified JavaScript into the Input box, or upload a .js file.
- Adjust formatting options like Indentation (2 spaces, 4 spaces, tabs) or Quote Style.
- Click "Beautify JavaScript".
- Review the newly formatted code in the output panel.
- Copy or download your beautified .js file.
Common Use Cases
- Debugging minified code from a production website.
- Formatting code copied from StackOverflow or old projects.
- Standardizing code style before submitting a pull request.
- Learning how a complex JavaScript function is structured.
Key Benefits
- Powered by Prettier for industry-standard, flawless formatting.
- Zero backend processing guarantees code privacy.
- Catches and highlights syntax errors with precise Line and Column numbers.
- Customizable settings to match your preferred coding style.
Frequently Asked Questions
Does this support modern ES6+ syntax?
Yes! This tool uses Prettier under the hood, which fully supports all modern JavaScript features including Arrow Functions, Async/Await, Destructuring, and Modules.
How do I change the indentation size?
Use the "Indentation" dropdown in the settings panel to choose between 2 Spaces, 4 Spaces, or Tabs.
Is my JavaScript code uploaded to a server?
No. This tool uses the standalone Prettier library directly within your web browser. Your code never leaves your device, ensuring complete privacy.
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