Random Letter Generator
Generate one or multiple random letters from A to Z. Choose uppercase, lowercase, unique letters or a custom alphabet.
Random letter generator
Advertisement
Letters are drawn locally with the browser Web Crypto API, not by animation or timing.
How to Use
- Pick uppercase, lowercase or both cases.
- Set the quantity, or enter your own custom alphabet.
- Enable unique letters if no letter may repeat.
- Press Generate letters, then copy or generate again.
Advertisement
How It Works
The generator builds an alphabet from your settings — 26 uppercase letters, 26 lowercase letters,
both, or exactly the characters you typed — and then draws from it with
crypto.getRandomValues() and unbiased integer sampling. That means every letter in
the active alphabet has the same chance and results do not depend on previous draws.
Unique mode samples without replacement, so within a single batch each letter appears at most once. If the requested quantity exceeds the alphabet size, the tool explains the mismatch instead of repeating letters. Custom alphabets have duplicate characters removed before sampling.
Examples
- Letter game: 5 uppercase unique letters → five distinct starting letters for a word game.
- Vowel drills: custom alphabet AEIOU with quantity 3.
- Initials: both cases, quantity 2 → a two-letter code such as Kt.
- Classroom draw: 26 unique letters → a full random ordering of the alphabet for activities.
Common Uses
- Word games, spelling drills and phonics exercises.
- Generating letters for classroom draws and turn order.
- Creating initials, codes and placeholder identifiers.
- Randomizing the order of an alphabet for teaching and testing.
Frequently Asked Questions
Can I generate lowercase letters instead of uppercase?
Yes. Choose uppercase, lowercase or both. The default is uppercase A–Z, and the Both option draws from all 52 letters with each letter equally likely.
Can I use my own alphabet?
Yes. Type any characters into the custom alphabet field and it overrides the case selector. Duplicate characters are collapsed, so each distinct character keeps an equal chance.
What does unique letters mean?
With unique mode, no letter repeats within one batch. Asking for more unique letters than the alphabet contains returns a clear error instead of silently repeating.
Is this useful for passwords?
No — letters alone are a weak password alphabet. For credentials use the Random Password Generator, which draws from letters, numbers and symbols with cryptographic guarantees.
How are the letters chosen?
Each letter is drawn with crypto.getRandomValues() from the active alphabet using unbiased sampling. There is no weighting and no dependence on previous letters.
Related Tools
Last updated: