Obviously its not a website Format.com is a small MSDOS Disk preparation software.

For further details on how to use it, type "Format /?" on the command prompt.

or u can type, Format c:
performs a low level format (size depends on the partition info)

if u want ur HD to be bootable after initialization, type, Format C: /s

if it is already formatted, type, format c: /q (performs a quick format)

U can also use multiple switches like Format c: /q /s (quick + transfer system files)

Note that the /s switch is not supported by windows XP MSDOS Shell.