JavaScript Minifier
Compress JavaScript with Terser to produce compact code for demos, snippets, and deploy artifacts.
JavaScript Minifier
Compress JavaScript with Terser to produce compact code for demos, snippets, and deploy artifacts.
About JavaScript Minifier
Terser-powered compression
The minifier uses Terser to parse and compress JavaScript, then returns the generated code. This can reduce whitespace, comments, and other removable syntax while keeping the executable behavior.
Keep readable source separately
The output is meant for compact delivery, not editing. Keep the formatted source or source maps in your normal workflow, especially when the code will be debugged after deployment.
FAQ
Common questions and answers about this topic.
What does JavaScript minification do?
Removes whitespace, comments, and shortens variable names to reduce file size for faster page loading.
Will minification break my code?
No, the minified code is functionally identical. However, debugging minified code is harder — use source maps in production.
How much can file size be reduced?
Typically 30-60% depending on code style and comment density.
Is my data sent to any server?
No, JavaScript minification runs entirely in your browser. Your source code is processed locally and never sent to any external service.