Does minifying change how my code executes?
No — output is behaviorally identical. Variable and function names are shortened and dead code may be removed, but program behavior doesn't change.
JavaScript Minifier
JavaScript Minifier
Compress modern JavaScript while preserving its behavior.
UTF-8 · JavaScript
About this JavaScript Minifier
Compress modern JavaScript while preserving its behavior.
Your JavaScript is processed locally in the browser. Nothing is uploaded or stored.
FAQ
Does this rename variables or mangle identifiers like Terser/UglifyJS?
Yes — this runs Terser itself, with compression and mangling both enabled, the same engine widely used in production JS build pipelines.
What's the difference between minifying and Gzip compression?
Minifying strips and mangles the source permanently; Gzip compresses the file during transfer on the server. They stack — use both in production.
Can I reverse minified JavaScript back to readable code?
The JavaScript Formatter will re-indent it, but original variable names and structure are gone once mangled — this isn't a deobfuscator, just a beautifier for whatever code remains.
How much does minifying actually reduce file size?
Depends on the original — heavily commented, loosely spaced code shrinks the most; already-tight code sees smaller gains.
Is my JavaScript code sent to a server?
No — minification runs 100% locally in your browser.
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