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License Key Generator

Create random product keys or serial numbers in a pattern you control.

Generate license keys

Keys: 0
Pattern length: 0
Estimated combinations: —
Keys are produced with the browser's secure random source. This tool formats keys only and does not sign or validate licences.

How to use the License Key Generator

  1. Write a pattern using X for each random character and dashes as separators.
  2. Choose the character set and how many keys you need.
  3. Click Generate keys and copy the list into your licensing system.

Features

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Frequently Asked Questions

Common questions about the free online license key generator.

Type a pattern with X where random characters should go, choose the character set and count, then click Generate keys and copy the list.
Each X is replaced by one random character from the alphabet you picked. Any other character, such as a dash, is copied through unchanged.
Every character comes from the browser's secure random source, so collisions are extremely unlikely at normal key lengths.
The default set leaves out letters and digits that look alike, such as I, O, 0 and 1, so keys are easier to read aloud and retype.
Yes. Choose the digits only alphabet and the keys will contain numbers, which suits numeric serial numbers and voucher codes.
No. This tool formats random keys. Signing a key to a customer or product needs your own server side licensing logic.
You can generate up to 200 keys in a single click and repeat as often as you like, with no account and no usage limit.
No. Keys are created in your browser, kept only in the text box and are never sent anywhere or saved.
It estimates the entropy of the key. More random slots and a larger alphabet make the key much harder to guess.
Use a distinct pattern and secret per product so a leaked list from one product cannot be used to forge keys for another.

Last updated: October 10, 2026