Minify JavaScript for production. Fast, secure, and completely free. All processing happens in your browser — no data is sent to any server.
A JavaScript Minifier removes everything from your source code that a JS engine doesn't need to execute it correctly: comments, unnecessary whitespace, and line breaks, while leaving the actual logic — variable references, function calls, control flow — intact. This is the same category of transformation performed by build tools like Terser or UglifyJS, though this tool focuses purely on whitespace and comment removal rather than aggressive variable-renaming or dead-code elimination, so the output stays predictable and easy to reason about if something needs debugging later.
When you need to embed a small script directly in an HTML page, a bookmarklet, or a quick browser console snippet, every extra character matters — bookmarklets in particular are often limited by URL length. Minifying strips the readability overhead you don't need in that context while keeping variable names intact, which makes the output far easier to debug than the output of an aggressive production bundler if something doesn't behave as expected.
No — this tool only removes whitespace and comments. Variable and function names stay exactly as you wrote them, which keeps the output readable enough to debug directly.
Not for production apps — those tools also handle bundling, tree-shaking, and more aggressive optimizations. This tool is best for quick, standalone snippets rather than a full application build pipeline.
Yes, potentially — collapsing multiple lines into one changes what a stack trace reports. Keep your unminified source for debugging and only ship the minified version.
Yes, modern ES2017+ syntax is preserved and minified correctly.
Yes, object literals inside your JS are minified along with the rest of the code, just like any other part of the script.