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.
Letters to Numbers Activities for the Classroom
Ready-to-run A1Z26 activities, games, and lesson ideas for teachers — from warm-ups to code-breaking challenges with answer keys.
Letters to Numbers in Rust — Code Guide
Convert letters to alphabet positions in Rust: byte arithmetic, char handling, and idiomatic iterator solutions with runnable examples.
Alphabet Position of Every Letter — A to Z List
Complete A-Z reference table with alphabet position, ASCII code, hexadecimal, and binary values for every letter. Learn the formula to calculate…
Best Cipher for Beginners
Ranked comparison of beginner-friendly ciphers. Step-by-step examples of A1Z26, Caesar, Atbash, and Vigenere with difficulty ratings and a…
Encoding vs Encryption vs Hashing — Differences
Clear explanations of encoding, encryption, and hashing with comparison tables, real examples (Base64, AES, SHA-256), and a guide to when to use…
English Gematria Systems Compared
Compare six English gematria systems side by side: Ordinal, Full Reduction, Reverse Ordinal, Reverse Reduction, Sumerian, and Chaldean. Worked…
Famous Gematria Examples
Explore famous gematria examples from the Bible (666 and Nero), Pompeii graffiti, Kabbalistic tradition, and modern pop culture. Historical…
Birthday Letters to Numbers
Encode birthday messages, dates, and names into number codes. Learn personalized birthday encoding methods, gift ideas with coded messages, and…
Letters to Numbers in C#
Convert letters to numbers in C# using char arithmetic, LINQ queries, and extension methods. Full .NET code examples for A1Z26 and ASCII conversions.
Google Apps Script Letters to Numbers
Convert letters to numbers in Google Apps Script using charCodeAt(). Build custom Sheets functions, batch processing scripts, and automated triggers.
Letters to Numbers in Java
Learn to convert letters to numbers in Java using charAt(), Character class, and streams API. Includes A1Z26 and ASCII approaches with unit tests.
8 Ways to Convert Letters to Numbers
Compare all 8 letter-to-number methods: A1Z26, A0Z25, Reversed, ASCII, Hex, Binary, T9, and Excel Column. Decision matrix, examples, and pros/cons…
Letters to Numbers for Numerology
Learn how numerology converts letters to numbers using Pythagorean and Chaldean systems. Calculate destiny, soul urge, and personality numbers…
Letters to Numbers in PHP
Convert letters to numbers in PHP using ord(), chr(), and mb_ord() for Unicode. Includes array_map approach, WordPress plugin example, and…
Letters to Numbers in SQL
Convert letters to numbers in SQL using ASCII() and CHAR() functions. Covers Oracle, MySQL, and PostgreSQL syntax with practical data cleaning…
Letters to Numbers for Tattoos
Design meaningful cipher tattoos by converting names, dates, and messages to numbers. Explore A1Z26, binary, Morse, and Roman numeral tattoo…
Letters to Numbers in VBA
Convert letters to numbers in VBA using Asc(), Chr(), and custom UDFs. Includes column letter conversion, A1Z26 cipher macros, and Excel macro…
What Is Gematria?
Learn what gematria is, its origins in Hebrew mysticism and Kabbalah, the major numbering systems, and how gematria is used today in numerology…