Secure Password Generator
Passwords produced on this page are generated when the page is accessed, never stored, and creating using a cryptographically-secure random number generator.
Password-12: 0DhtVriDvIh4
Bit strength: 71.45
Combinations: 3.23 x 10^21
Years to crack*: 292
Utility: typical web sites
Password-12 (special characters): pF\M"YQ~1>P*
Bit strength: 78.46
Combinations: 4.19 x 10^23
Years to crack*: 37920
Utility: typical web sites
Password-14: UnO8sPOG508DeS
Bit strength: 83.36
Combinations: 1.24 x 10^25
Years to crack*: 1.12 million
Utility: web sites needing a little more security
Password-16: 4l91gEyj55yW3XPp
Bit strength: 95.27
Combinations: 4.77 x 10^28
Years to crack*: 4.3 billion
Utility: sites needing even more security (e.g., bank accounts)
Password-43: AoyfnNhZ02AP9u4Q1bcDKkigyxfC41rtWvP1OdvQMMH
Bit strength: 256
Combinations: 1.18 x 10^77
Years to crack*: 1.07x10^58 years
Utility: AES Crypt, highly secure data
Password-64: nxcOGfJBq0HuUVltM4uVkqHsrGhgG5iIqeuV02WLi3vpeRqi4JBiY08ArFoerdMl
Bit strength: 381
Combinations: 5.16 x 10^114
Years to crack*: 4.68x10^95 years
Utility: AES Crypt, highly secure data
* The "years to crack" values assume one is using a password cracking tool that can crack passwords at a rate of 350 billion passwords per second. Per this CNET article, that was the rate at which passwords could be cracked by high-end dedicated password cracking devices as of 2012. It is important to remember that, there may be devices that can work at higher speeds and any number of devices may operate in parallel to achieve higher performance.
Use the Password Generator as a Web Service
If you wish to use the Password Generator as a web service, you may pass an Accept header via HTTP specifying the media type, or you may pass an "f" parameter to indicate that you want plain text, XML, or JSON.
More Information
If you want code that will generate passwords similar to how this web page creates passwords, you can download the pwgen utility. On that page, you will also find more details behind the math used.
External Links
Several sites can check the strength of your password:
Warning: While the following tools are interesting for understanding password strength, never enter a real password on any site.