File to Byte

100% client-side tool to convert any file into a byte array, hex dump, or C-style 0x hex literal directly in your browser.

Author: SATOSprod
License: MIT — see LICENSE

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Features

• Any file, any extension — .exe, .png, files with no extension at all; every file is treated as raw bytes.
• Three output formats:
  • Hex dump — standard offset / hex / ASCII layout (like hexdump -C).
  • Byte array — comma-separated decimal array (0-255), ready for test fixtures.
  • 0x hex — C-style hex literals (0x00, 0xFF, 0xB3), perfect for C/C++/Java/Python source code.
• Client-side only — files are read directly into memory via the FileReader API. Nothing is ever uploaded to a server.
• Large file support — safely loads large files (e.g., 100 MB+). A live progress bar and randomized character loading screen keep the UI responsive while reading. Dumps are capped at 2 MB for DOM performance, but exact sizes are always reported.
• Copy and Download — one-click copy to clipboard or download as a .txt file.

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How It Works

1. Drop a file into the designated drop zone, or click to open the file browser.
2. The browser's FileReader.readAsArrayBuffer reads the file natively.
3. For large files, a Loading... screen with a live percentage progress bar tracks the read operation.
4. Once loaded, click the tabs (hex dump, byte array, 0x hex) to switch between data views.
5. Click Copy to copy the current view to your clipboard, or Download .txt to save it locally.

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Technical Details

• Built entirely with standard HTML, CSS, and vanilla JavaScript.
• Zero dependencies — no React, Vue, jQuery, or external libraries.
• The UI follows a strict, minimalist, programming-oriented design: no shadows, no glowing effects, and precise monospace typography.
• Fully responsive on mobile and desktop screens.

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File Structure

file-to-byte/
├── index.html        ← Structure, copy, layout, and client-side conversion logic
├── style.css         ← Minimalist flat design styles
├── favicon.svg       ← SVG logo (F2B)
└── og-image.png      ← Open Graph image for social sharing

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License

This project is released under the MIT License.
See LICENSE for full terms.

© 2026 SATOSprod