Paste your script into a browser-based JavaScript minifier and it removes comments, whitespace and line breaks to produce a smaller file that behaves the same. The minification runs on your device, so proprietary code is never uploaded, and the compact output downloads faster for your users.
Free lightweight JavaScript minifier. Remove comments and collapse whitespace to shrink JS for quick inline use. Preserves strings and reports bytes saved.
Open JavaScript Minifier → Free toolFree JavaScript formatter and beautifier. Expand minified or one-line JS into readable, indented code with proper brace and block structure.
Open JS Formatter / Beautifier →JavaScript minification strips out everything that helps humans but not the interpreter: comments, indentation, and unnecessary spaces and newlines. The result runs identically but is smaller, which means less to download and parse. Because your script is often proprietary logic, doing this in the browser instead of on someone else's server keeps the source private.
For a single script or a quick snippet, a browser minifier is the fastest way to shrink it. For a whole application, build tools like esbuild or a bundler minify as part of the pipeline and also handle module resolution and renaming. Think of the browser tool as the right choice for one file or a fast check, and a formatter for reading minified code you did not write.
It removes comments and whitespace without changing behavior. Keep your readable source and minify a copy.
No. Minification runs entirely in your browser, so the source stays on your device.
Run it through a JavaScript formatter, which re-indents the code into a readable layout.