Subnet & Password Tools

A fast IPv4/IPv6 subnet calculator and a strong password & passphrase generator.

Everything on this page runs in your browser — nothing you type or generate is ever sent to our servers.

Subnet calculator Runs in your browser

Type an IPv4 or IPv6 address with a prefix or netmask — results update as you type. Drag the slider to resize the subnet.

Address / prefix

Prefix /24

Password generator Runs in your browser

Generate strong random passwords or memorable passphrases, in English or Swedish. Adjust everything to match your policy.

Quick picks

Words 4

Total length 24

Language

Separator

Start with digits

Theme

Capitalize words Append a number

Click a password to copy it.

Spell it out (phone alphabet)

Randomness comes from your browser’s cryptographic generator. Wordlists: EFF large wordlist (English, 7,776 words) and a curated Swedish diceware list (7,568 words).