JavaScript Minifier
Basic JavaScript minification for quick size reduction.
About this tool
Basic JavaScript minification for quick size reduction. Quick payload size checks, text cleanup, and deploy prep during development.
Paste a JavaScript snippet you want to shrink for a quick size check. Run basic minification to strip comments and compressible whitespace. Example — Tiny function minify: try `function hello() { return 1; }` and expect something like `function hello(){return 1;}`.
Provides basic minification only — not production-grade compression like Terser or esbuild. See also: HTML Minifier. Runs in your browser — nothing you paste gets uploaded.
How to use
- Paste a JavaScript snippet you want to shrink for a quick size check.
- Run basic minification to strip comments and compressible whitespace.
- Copy the result for demos, bookmarks, or rough payload estimates.
- For production builds, switch to a dedicated bundler minifier afterward.
Example
Tiny function minify
Input
function hello() { return 1; }Output
function hello(){return 1;}Limitations
- Provides basic minification only — not production-grade compression like Terser or esbuild.
- Does not mangle names, dead-code eliminate, or transpile modern syntax.
- Unsafe patterns or ASI edge cases should be verified in a real build pipeline.
Related tools
1Frequently asked questions
What does the JavaScript Minifier do?
Basic JavaScript minification for quick size reduction. Runs in your browser — no install, no account.
How do I use the JavaScript Minifier?
Paste a JavaScript snippet you want to shrink for a quick size check. Run basic minification to strip comments and compressible whitespace. Copy the result for demos, bookmarks, or rough payload estimates. For production builds, switch to a dedicated bundler minifier afterward.
Is the JavaScript Minifier free?
Yes. No signup, no usage limits, no paywall.
Does the JavaScript Minifier upload my data?
No. Processing happens locally in JavaScript. Your input is not uploaded, stored, or logged.
What are the limitations of the JavaScript Minifier?
Provides basic minification only — not production-grade compression like Terser or esbuild. Does not mangle names, dead-code eliminate, or transpile modern syntax. Unsafe patterns or ASI edge cases should be verified in a real build pipeline.