How to Generate Random Letters A to Z Online

To generate random letters A to Z, open the ByteTools Random Letter Generator, choose uppercase or lowercase, set how many letters you want, decide whether repeats are allowed, then click Generate and copy the result. Every draw is fair and instant because the tool picks letters locally in your browser using a cryptographically secure random source.

This guide covers each step, explains the three settings, and shows why an in-browser picker beats guessing a letter in your head.

What the random letter generator does

The tool draws letters from the 26-letter English alphabet. You control the case, the number of letters, and whether the same letter can appear twice. Turn duplicates off and it behaves like drawing unique lettered tiles from a bag — perfect when every letter must be different. Because there are only 26 letters, a no-repeat draw cannot exceed 26 characters.

Step-by-step tutorial

1. Choose the case. Toggle uppercase (A–Z) or lowercase (a–z) to match your game, code or test.
2. Set the count. Enter how many letters you want in the draw — one for a single pick, more for a sequence.
3. Decide on repeats. Leave "Allow duplicates" on for independent picks, or turn it off so every letter is unique.
4. Click Generate. Your random letters appear instantly, drawn with the browser's secure random source.
5. Copy or regenerate. Copy the result with one click, or generate a new set as many times as you like.

Understanding the three settings

A common combination is a single uppercase letter with duplicates on for a quick game pick. For a unique ordering of several letters, set a higher count and turn duplicates off.

Why generate letters in the browser

Picking a letter "randomly" in your head is biased — people favour certain letters without realising. This tool uses crypto.getRandomValues and rejection sampling to remove modulo bias, so every letter is equally likely on every draw. It also runs entirely on your device: nothing is uploaded or stored, it works offline once loaded, and there is no account or install. That makes it safe and instant for classrooms, game nights and quick coding tasks alike.

Try the Random Letter Generator — free and 100% in your browser.

FAQ

How do I pick just one random letter?

Set the count to 1, choose your case, and click Generate. You get a single fair letter you can copy immediately.

What is the maximum number of unique letters I can draw?

With duplicates off, the alphabet has 26 letters, so a no-repeat draw tops out at 26. Above that, you must allow duplicates.

Can I switch between uppercase and lowercase after generating?

Yes. Flip the case toggle and generate again to get the same style of draw in the case you need.

Do I need internet access to use it?

No. Once the page loads, picking happens locally, so it keeps working offline, including as an installed app. Nothing you generate is uploaded.

Related free tools

• Random String Generator — build longer random strings and codes.
• Random Number Generator — draw random numbers in any range.
• PIN Generator — generate secure numeric PINs.
• Random List Picker — pick a random item from your own list.

Built by ByteVancer

ByteTools is a free product of ByteVancer, a software and web development studio building web apps, SaaS and custom software. If you like these fast, private browser tools, explore what ByteVancer can build for you.