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Random Alphanumeric

Create mixed letter and digit strings of any length, with ambiguous characters excluded on request.

Generate alphanumeric strings

Character pool: — · Entropy per string: —
Ambiguous characters are removed before drawing, so the strings stay easy to read out loud or type from paper.

How to use the Random Alphanumeric

  1. Choose the length of each string and how many you want.
  2. Pick the character set and decide whether to drop ambiguous characters.
  3. Click Generate, then copy the whole batch.

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Frequently Asked Questions

Common questions about the free online random alphanumeric.

Set the length and the number of strings, choose a character set, then click Generate to fill the box.
The capital O, the digit zero, the lower case o, the capital I, the lower case l and the digit one are the usual confusions.
Yes. Each character is drawn with rejection sampling from the browser secure random generator, so no character is favoured.
Yes. They work well as order references, coupon codes or test data, though they are not guaranteed to be unique.
It depends on the pool size and the length. A twelve character mixed string is roughly seventy one bits.
Yes. Pick the uppercase and digits option to leave lower case letters out of the pool entirely.
No. Everything is generated locally in your browser and never leaves your device.
Yes. The generator is free, unlimited and needs no account.

Last updated: October 10, 2026