JS Minifier
Minify JavaScript by shortening variable names and removing unnecessary code — reducing file size safely.
Runs entirely in your browser — your files are never uploaded to a server.
How It Works
1. Choose Your File
Drag & drop or select the file you want to work with.
2. Processed in Your Browser
Everything happens locally on your device — your file is never uploaded anywhere.
3. Download Your Result
Get your finished file instantly, ready to save or share.
Frequently Asked Questions
Is it safe to use minified code in production?
Yes — this uses Terser, the same industry-standard minifier used by default in tools like webpack and Vite, which fully parses your code rather than using risky find-and-replace text patterns.
Will minifying change how my code behaves?
No, the logic stays identical — only variable names, whitespace, and redundant code are affected.
What happens if my JavaScript has a syntax error?
You'll see a clear error message rather than a broken result.
How much smaller will my JavaScript get?
It varies by code style, but typically 30-70% smaller, especially for code with long variable names and lots of comments.