JavaScript Minifier

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.

Yes! Simply check the "Remove Console Logs" option before minifying, and all console.log() statements will be stripped from the final output.

No. This tool uses Terser directly within your web browser. Your code never leaves your device, ensuring complete privacy.

In general, no. Minifiers like Terser are designed to safely transform syntax without changing its logic. However, if your original code has severe syntax errors or relies on implicit globals improperly, minification can expose those bugs.

Yes, it fully supports modern JavaScript features including Arrow Functions, async/await, and classes.

Minifying is primarily focused on reducing file size. Obfuscating is focused on making the code difficult for humans to understand to protect intellectual property. While variable mangling does obfuscate code slightly, true obfuscation uses much more complex techniques.

The savings vary depending on your coding style, but it is common to see file sizes reduced by 30% to 60%, especially if your original code is heavily commented and uses long variable names.

You should only minify code for production deployments. During development, you should use the unminified versions to easily debug and trace errors using browser developer tools.

Debugging minified code directly is very difficult. In professional environments, developers use Source Maps, which map the minified code back to the original source. If you don't have a source map, you can use a tool like our JS Beautifier to make it readable again.

You can format minified code using our JavaScript Beautifier tool to make it readable again. However, original comments and original variable names (if mangled) cannot be recovered.