What is A1Z26 encoding?

A1Z26 encoding is a simple substitution cipher where each letter of the alphabet is replaced by its numerical position (A=1, B=2, C=3, up to Z=26). This encoding method has been used for decades in puzzles, games, and educational activities. It's one of the most basic forms of text encoding and serves as an introduction to cryptography concepts.

How do I convert letters to numbers?

Using our letter to number converter is simple: 1) Enter your text in the input field, 2) Choose your preferred delimiter (space, comma, hyphen, etc.), 3) Click the Convert button. The tool will instantly transform each letter to its corresponding number (A=1, B=2, etc.) while preserving non-letter characters.

What delimiter should I use?

The choice of delimiter depends on your use case: Space is most common and easiest to read, Comma works well for compact lists, Hyphen is popular for puzzle creation, Colon and Semicolon add complexity for challenging codes. For simple encoding, we recommend using space as your delimiter.

Can I convert numbers back to letters?

This tool converts letters to numbers (A1Z26 encoding). For the reverse conversion (numbers to letters), you'll need a separate number to letter converter tool. This separation allows for more specialized functionality and better user experience for each specific conversion direction.

Are uppercase and lowercase treated the same?

Yes, the letter to number converter treats uppercase and lowercase letters identically. 'A' and 'a' both convert to '1'. This makes the tool more user-friendly as you don't need to worry about case when entering text. The output uses numbers only, so case doesn't apply to the result.

What happens to non-letter characters?

Non-letter characters such as spaces, numbers, and punctuation marks are preserved exactly as entered in the output. For example, 'HELLO WORLD!' with space delimiter becomes '8 5 12 12 15 23 15 18 12 4 !' - notice the double space where the original space between words is preserved.

Is this tool free to use?

Yes, our letter to number converter is completely free to use with no registration required. You can convert as many texts as you like, and all features including copy to clipboard and download are available at no cost. The tool works entirely in your browser for fast, private conversions.

Is my text processed securely?

Yes, all text processing happens locally in your browser using JavaScript. Your text and conversions never leave your device or get transmitted to any servers, ensuring complete privacy and security for your data. This makes it safe to encode sensitive or personal information.

Letter to Number Converter

Convert letters to numbers and numbers to letters using A1Z26 encoding. Transform text like HELLO to 8-5-12-12-15 or numbers back to letters. Perfect for encoding messages, puzzles, games, and educational activities with customizable delimiters.

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Convert letters to numbers using A=1 through Z=26.

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How it works: Maps each alphabet letter to its position (A=1 ... Z=26) and preserves non-letter characters.

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