Free Letters to Numbers Convert Alphabet to Digits

Bi-Directional Translation

Encode secret messages or decode ciphers instantly. Use the central Cryptex Cylinder to choose your mapping algorithm (A=1, A=0, Reverse), and watch the dual-plate interface translate your text in real-time, in both directions.

Language
Unlimited Local Ciphers
Alpha Plate (A-Z)
Cipher Mode
Delimiter
Numeric Plate (0-9)
0
Chars Translated
0
Words Processed
Regex
Parsing Engine
100%
Local Privacy
Super Features
Bi-Directional Sync
No need to click a switch to reverse the tool. The Alpha and Numeric plates talk to each other simultaneously. Type letters to get numbers, or type numbers to get letters.
The Cryptex Core
A centralized, mechanical-looking cylinder that houses your cipher settings. It includes a moving ticker tape that visually confirms the active mapping (e.g., A=1, B=2).
Multiple Cipher Modes
Support for standard A=1 encoding, zero-indexed A=0 encoding for programmers, and the famous reverse Z=1 (Atbash-style) cipher for escape rooms and puzzles.
Custom Delimiters
Control exactly how your numeric output is formatted. Choose between dashes (8-5-12-12-15), spaces, or commas to match whatever decoding system you are using.
Zero-Latency Engine
There is no "Translate" button. Our JavaScript Regex engine fires on every keystroke, parsing strings and arrays in milliseconds to provide an instant flow state.
100% Client-Side
Whether you are encrypting a love letter, a secret password, or geocaching coordinates, the math happens strictly in your browser's RAM. Nothing is sent to a server.
How to Use
01

Set the Cryptex

Use the central mechanical cylinder to select your desired Cipher Mode (Standard A=1 is default) and choose how you want numbers to be separated (Delimiter).

02

Type & Translate

To convert text to numbers, type in the top Alpha Plate. To convert numbers back to text, type in the bottom Numeric Plate. The translation happens instantly.

Copy the Output

Once your secret message is ready, click the copy icon located at the top right of the target plate to save the encoded/decoded string to your clipboard.

Why Cryptex AI is Superior
Workflow
🔄

No Mode Switching

Standard tools force you to click a button to switch between "Letters to Numbers" and "Numbers to Letters". Our dual-plate design lets you do both effortlessly.

Design
⚙️

The Mechanical Aesthetic

We avoided boring side-by-side text boxes. The glowing plates separated by a metallic, moving Cryptex cylinder makes decoding feel like hacking a safe in a spy movie.

Logic
🧠

Smart Tokenization

If you type "Hello World!", the engine knows to translate the letters, keep the spaces as word separators (`/`), and ignore punctuation, preserving the structure of your message perfectly.

Success