Is minified JavaScript safe to use in production?

Yes. Minification only removes whitespace, comments, and renames local variables. It does not change program logic. Terser is the default minifier in Webpack, Rollup, and Vite.

What is the difference between minification and obfuscation?

Minification reduces file size. Obfuscation makes code harder to reverse-engineer. Terser's mangling provides mild obfuscation as a side effect of size optimization.

Can I minify TypeScript or JSX?

Terser supports ES2020+ JavaScript but not TypeScript or JSX directly. Transpile to JavaScript first with tsc or Babel before minifying.

What does mangle mean in Terser?

Mangling renames local variables to shorter names (a, b, c), reducing file size by 20-30% additional. It does not affect exported names or public APIs.

Should I keep source maps?

Generate source maps but keep them private. Serve them only to your team or error monitoring services like Sentry for readable stack traces without exposing source code.

My code broke after minification — what happened?

Common causes: code using eval() with local variable names, relying on Function.name strings, or circular dependencies. Disable mangling first to isolate the issue.

Is minified JavaScript safe to use in production?

Yes. Minification only removes whitespace, comments, and renames local variables. It does not change program logic. Terser is the default minifier in Webpack, Rollup, and Vite.

What is the difference between minification and obfuscation?

Minification reduces file size. Obfuscation makes code harder to reverse-engineer. Terser's mangling provides mild obfuscation as a side effect of size optimization.

Can I minify TypeScript or JSX?

Terser supports ES2020+ JavaScript but not TypeScript or JSX directly. Transpile to JavaScript first with tsc or Babel before minifying.

What does mangle mean in Terser?

Mangling renames local variables to shorter names (a, b, c), reducing file size by 20-30% additional. It does not affect exported names or public APIs.

Should I keep source maps?

Generate source maps but keep them private. Serve them only to your team or error monitoring services like Sentry for readable stack traces without exposing source code.

My code broke after minification — what happened?

Common causes: code using eval() with local variable names, relying on Function.name strings, or circular dependencies. Disable mangling first to isolate the issue.

JS Minifier

Compress JavaScript instantly. Removes whitespace, comments, and optimizes variable names. Processed 100% in your browser — your code stays private.

Input JavaScript

Output Minified

100% Private

Semua pemrosesan terjadi di browser Anda melalui Terser.js. Kode Anda tidak pernah dikirim ke server mana pun.

DukunganES2020 +

Terser mendukung JavaScript modern termasuk fungsi panah, async/await, kelas, dan literal template.

Pemuatan Halaman Lebih Cepat

Minifying JS mengurangi ukuran file sebesar 30 -70%, meningkatkan skor Time to Interactive dan Core Web Vitals.

Apa itu Minifikasi JavaScript?

Minifikasi JavaScript adalah proses menghapus semua karakter yang tidak perlu dari kode sumber tanpa mengubah fungsinya. Ini termasuk spasi, jeda baris, komentar, dan nama variabel panjang — yang diganti dengan ekuivalen yang lebih pendek. Hasilnya adalah file yang lebih kecil yang mengunduh dan mem - parse lebih cepat, tetapi secara fungsional identik dengan aslinya.

This tool uses Terser — the industry-standard JavaScript minifier and the engine behind Webpack, Vite, and esbuild. Terser performs both minification (removing whitespace and comments) and mangling (renaming variables to shorter names like a, b, c), achieving reductions of 30–70% depending on code style. It fully supports ES2020+ syntax including async/await, optional chaining, and nullish coalescing.

Meminimalkan JavaScript secara langsung meningkatkan Core Web Vitals. Bundel JS yang lebih kecil mengurangi Time to Interactive (TTI) dan Total Blocking Time (TBT) — dua metrik yang diukur Google dalam audit Mercusuar dan digunakan sebagai sinyal peringkat. Wawasan PageSpeed Google akan menandai JavaScript yang tidak diakhiri sebagai peluang "Hilangkan sumber daya pemblokiran perenderan" atau "Minifikasi JavaScript ".

Kapan Meminimalkan JavaScript

Minify JS ketika:

✓ Menyebarkan ke produksi — selalu melayani JS minified
✓ Skor PageSpeed Insights Anda menunjukkan "Minify JavaScript"
✓ Menangani skrip pihak ketiga yang tidak di - minifikasi sebelumnya
✓ Mengurangi payload untuk pengguna ponsel pada koneksi yang lambat
✓ Improving Time to Interactive (TTI) dan Total Blocking Time
✓ Menggabungkan beberapa skrip kecil sebelum penyebaran

Pengurangan ukuran umum:

• Well-commented library: 50–70% reduction
• Typical application code: 30–50% reduction
• Already compressed or generated code: 10–20% reduction
• Kompresi gzip tambahan di atas: lanjut 60 -80%

Untuk efek maksimal, minifikasi terlebih dahulu, kemudian sajikan dengan kompresi gzip atau Brotli dari server web Anda.