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HTML Minifier
Compress and minify HTML code online to reduce file size and improve website load speed.
JavaScript Minifier
A powerful, 100% client-side JavaScript minifier powered by Terser. Instantly remove whitespace, strip comments, drop console logs, and mangle variable names to drastically reduce your JS file sizes. Perfect for preparing scripts for production deployment while maintaining complete data privacy.
Original Size 0 B
Minified Size 0 B
Saved 0%
What is the JavaScript Minifier?
The FreeTechLearner JavaScript Minifier is an essential web optimization tool that strips unnecessary characters (like spaces, tabs, and comments) from your JS files. It also applies advanced optimizations like variable mangling and dead-code removal to shrink your file sizes to the absolute minimum.
How to Use
- Paste your JavaScript code into the Input box, or upload a .js file.
- Select your desired optimization options (e.g., Mangle Variables, Remove Console Logs).
- Click "Minify JavaScript".
- View the minified output and the exact file size savings in the statistics panel.
- Copy or download your compressed .js file.
Common Use Cases
- Preparing a JavaScript library for production release.
- Reducing the payload size of a website to improve Google Lighthouse scores.
- Stripping out development console logs before deploying code.
- Obfuscating code slightly via variable mangling.
Key Benefits
- Instant compression with industry-standard Terser engine.
- Zero backend processing guarantees code privacy.
- Catches and highlights syntax errors with precise Line and Column numbers.
- Actionable statistics show exactly how much bandwidth you saved.
Frequently Asked Questions
What is Variable Mangling?
Variable Mangling safely replaces long local variable and function names (like "calculateTotal") with very short ones (like "a" or "x") to save space, without breaking your code.
Can this tool remove console logs?
Yes! Simply check the "Remove Console Logs" option before minifying, and all `console.log()` statements will be stripped from the final output.
Is my JavaScript code uploaded to a server?
No. This tool uses Terser directly within your web browser. Your code never leaves your device, ensuring complete privacy.
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