file2bin

file2bin is a single-file web app (index.html) that converts files to and from .bin (hex), with optional browser-side encryption.

Current UI languages: Chinese (zh-CN) and English (en-US).

Features

• Single-file app: HTML, CSS, and JavaScript are all in index.html
• Local processing in the browser (no backend required)
• Built-in multilingual UI (zh-CN and en-US)
• Two-way conversion:
  • file → .bin (hex)
  • .bin (hex) → file
• Optional encryption via Web Crypto API (aes-256-gcm + pbkdf2)
• Mobile-first layout (max content width: 600px)

Internationalization (i18n)

• Runtime i18n is implemented with a lightweight in-file dictionary (messages) and translation helper (t()), with no build step.
• Locale detection priority:
  1. ?lang=... in URL
  2. localStorage.file2bin_locale
  3. navigator.language
  4. fallback to zh-CN
• You can switch language in the page header and the choice is persisted in local storage.

Requirements

• A modern browser with Web Crypto API support
• Secure Context is required for encryption/decryption (https:// or http://localhost)

Quick Start

Option 1: Open directly

Open index.html in your browser.

Note: On file://, encryption/decryption may be unavailable in some browsers because crypto.subtle requires a Secure Context.

Option 2: Serve locally

python3 -m http.server 8080

Then visit http://localhost:8080/.

Security & Privacy Notes

• File processing is local to your browser session.
• Use a strong password when enabling encryption.
• If you lose the password, encrypted data cannot be recovered.

Limitations

• Very large files may consume significant browser memory.
• This project currently has no automated tests.

Project Structure

.
├── index.html      # main app (runtime file)
├── README.md
├── .gitignore
└── LICENSE

License

MIT License - see LICENSE