ShadowCode v4

ShadowCode is a lightweight, self-contained HTML utility designed for encrypting and decrypting everyday messages and files.

v4: added morce code, new multi tab, updated the UI a bit, lots of other small things.

Features

• Auto-Analysis Engine — Automatically detects and cracks ciphers like Atbash and Shift using English word scoring.
• File Encryption — Encrypt and decrypt supported file types.
• Keyless Vigenère — Solve Vigenère ciphers without a key.
• Dual Encryption — Layer multiple ciphers for extra complexity.
• Multiple Ciphers — Includes Vigenère, Atbash, Index Substitution, Shift, ShadowGlyph, morse code, and Rail ciphers.
• Portable — No installation required; works directly in your browser, note: dose need wifi for tailwind (UI formating).

Built With

• HTML5
• Tailwind CSS
• JavaScript (ES6+)
• AI Assistance (logic and refinement)

Getting Started

1. Download the HTML file
2. Open it in your browser
3. And then encrypt you messages

Updates are built into the UI — ShadowCode can notify you when a new version is available.

Feedback

UX is my buggest focus. If something feels confusing or you have a feature idea, feedback is always welcome.