Learn Ciphers, Codes & Conversions
In-depth guides on letter-to-number encoding systems, cipher techniques, and practical tutorials for Excel, Python, JavaScript, and Google Sheets. From beginner-friendly secret codes for kids to advanced cryptography history.
A1Z26 Cipher: The Complete Guide
Master the A=1, B=2, C=3 alphabet position cipher. History, encoding rules, decoding techniques, and practical applications in escape rooms and geocaching.
How to Convert Letters to Numbers in Excel
Step-by-step Excel formulas for converting letters to alphabet positions. CODE(), COLUMN(), and custom VBA functions with downloadable examples.
Convert Letters to Numbers in Google Sheets
Google Sheets formulas and Apps Script functions for letter-to-number conversions. ARRAYFORMULA batch processing and custom function walkthroughs.
Convert Letters to Numbers in Python
Python methods for converting letters to numbers: ord(), string module, list comprehensions, and building a complete cipher encoder class.
Letters to Numbers in JavaScript
JavaScript techniques for letter-number conversion using charCodeAt(), fromCharCode(), and building interactive cipher tools for the browser.
10 Secret Codes for Kids Using Numbers
Fun, educational number-based secret codes children can learn and use. From simple A1Z26 to reverse alphabet and phone keypad ciphers.
Geocaching Cipher Guide
Decode the most common cipher types found in geocaching puzzle caches. A1Z26, Caesar shifts, Morse code, and coordinate extraction techniques.
Escape Room Ciphers — Complete Code Guide
Master every cipher type used in escape rooms. Step-by-step decoding strategies for number codes, symbol substitutions, and hidden patterns.
ASCII vs A1Z26 — Which Encoding to Use?
A clear comparison of ASCII and A1Z26 encoding systems. When to use each, key differences, conversion formulas, and practical use cases.
History of Ciphers — From Caesar to Modern
A journey through cipher history from ancient Roman substitution ciphers to Enigma machines and modern public-key cryptography.
What Number Is Each Letter of the Alphabet?
The complete A-Z alphabet number reference. Every letter mapped to its position, with printable charts, memory tricks, and conversion tips.