i18nizer is a developer-first CLI that extracts translatable strings from JSX/TSX files, automatically generates i18n JSON files, and rewrites your components to use t().

It is designed to be fast, scriptable, CI-friendly, and completely independent from your project configuration.

• OpenAI
• Google Gemini
• Hugging Face (DeepSeek)

npm install -g i18nizer

Requires Node.js 18+

i18nizer keys --setOpenAI <YOUR_OPENAI_API_KEY>
i18nizer keys --setGemini <YOUR_GEMINI_API_KEY>
i18nizer keys --setHF <YOUR_HUGGING_FACE_API_KEY>

Keys are stored inside:

[HOME]/.i18nizer/api-keys.json

i18nizer extract <file-path> --locales en,es,fr --provider openai

Flags:

• --locales → Languages to generate (default: en,es)
• --provider → openai | gemini | huggingface (optional)

export function Login() {
  return (
    <div>
      <h1>Welcome back</h1>
      <p>Please sign in to continue</p>
      <button>Sign in</button>
    </div>
  );
}

import { useTranslations } from "next-intl";

export function Login() {
  const t = useTranslations("Login");

  return (
    <div>
      <h1>{t("welcomeBack")}</h1>
      <p>{t("pleaseSignInToContinue")}</p>
      <button>{t("signIn")}</button>
    </div>
  );
}

{
  "Login": {
    "welcomeBack": "Welcome back",
    "pleaseSignInToContinue": "Please sign in to continue",
    "signIn": "Sign in"
  }
}

.i18nizer/
├─ api-keys.json
├─ tsconfig.json
└─ messages/
   ├─ en/
   │  └─ Login.json
   ├─ es/
   │  └─ Login.json
   └─ fr/
      └─ Login.json

• Works with JSX & TSX
• Rewrites components automatically (t("key"))
• Always generates English camelCase keys
• Supports any number of locales
• Isolated TypeScript parsing (no project tsconfig required)
• Friendly logs, and errors

• Configurable output directory
• Framework support (Vue, Svelte)
• i18n library presets (next-intl, react-i18next)
• Watch mode
• Non-AI fallback mode

• API keys are never committed
• JSON files are stored per project in .i18nizer/
• Designed for incremental adoption

Made with ❤️ by Yoannis Sánchez Soto