License Key
Generate Microsoft-style license keys — grouped uppercase alphanumeric with hyphens. Default 5×5 = 25 characters. Crockford-style alphabet (no 0/O/I/L/1) so keys are unambiguous when read aloud.
About License Key
License Key produces Microsoft-style product keys: groups of uppercase alphanumeric characters separated by hyphens, defaulting to five groups of five for a 25-character key. It uses a Crockford-style alphabet that drops 0, O, I, L, and 1, so keys stay unambiguous when someone reads one aloud or types it off a label. Generation is local to your browser, with no server involved.
- Category
- create
- Input
- Accepts: */*.
- Output
- Outputs: application/json.
- Cost
- Free, runs in your browser
- Memory
- low
Common uses
- Generate serial keys for a desktop app's activation flow
- Create unambiguous keys printed on packaging or stickers that customers type in manually
- Seed a licensing database with a batch of unique product keys
- Make voucher or redemption codes that are easy to dictate over the phone
- Prototype an offline activation scheme without standing up a key server
- Produce demo license keys for screenshots and documentation
Frequently asked questions
Why are 0, O, I, L, and 1 excluded?
The Crockford-style alphabet removes characters people commonly confuse, so a key read aloud or typed from print is far less error-prone.
Can I change the grouping?
The default is 5 groups of 5 (25 characters), and the format is the classic hyphen-separated layout.
Are the keys random and unique?
Each key's characters are drawn from your browser's secure random generator. With a 25-character key, accidental collisions are extremely unlikely.
Does anything get uploaded?
No. Keys are generated entirely in your browser and never sent anywhere.
What does the tool return?
JSON containing the generated key or keys, so you can grab one or pull a batch into your own code.
Keywords
- license
- key
- serial
- product-key
- generate
- random