Passphrase

12.9 bits per word, from a list of 7,776 — and zero for the capital letters.

words.passphrase · v1 · renderer text

clamshell-xerox-overcrowd-theater-half-cherisher

entropy in

16 bytes

stream used

12 bytes

entropy out

77.6 bits

rejections

duration

3,309 µs

bits per word

12.93

list size

7,776

formula

H = 6 × log₂(7,776) = 77.55 bits

crack time

35 thousand years

assumption

10¹¹ guesses/second — a GPU rig against a fast hash.

free extras

Separator between words — worth 0.00 bits, because the rule is deterministic

Seed receipt

Class C · Observational

A magnitude 4.3 earthquake, 13 km NW of Cepitá, Colombia, 153.8 km down — 50 minutes ago.

Carries only tens of bits of genuine surprise. Always mixed with the OS CSPRNG.

source: USGS Seismic Feed
observed: 2026-09-13T17:55:25+00:00
latency: 149ms
mixed with: csprng — always

https://earthquake.usgs.gov/earthquakes/eventpage/us7000th7k ↗

No permalink

This generator makes secrets, so it is never given a shareable link. A password with a replayable URL is not a password — anyone holding the link could recompute it byte for byte, forever. The seed token is discarded the moment the response is written; nothing here is stored, logged or recoverable.

seed · withheld by design · words.passphrase is marked sensitive

Controls · from schema()

Words

4 12

Six words is 77.5 bits. Four is 51.7 — fine for a laptop login, not for a password manager.

Wordlist

Separator

Capitalise each word

Adds zero bits. It is a rule, and the attacker has the rule too.

Append a number

Adds 6.6 bits, because this one is actually drawn at random.

Entropy source

Picking a source changes the story on the receipt, never the quality: anything below class A is mixed with the OS CSPRNG before it reaches you. This result actually came from USGS Seismic Feed.

There is no same-seed re-render here. Recomputing a secret from a kept seed is exactly the thing this generator refuses to make possible, so every change of parameters draws fresh entropy.

seed token withheld

Nothing to keep: no token is issued for a generator that makes secrets.

This page and /api/v1/g/words.passphrase run the same code. There is no private endpoint.

Passphrase

Result

Measurements

Seed receipt

No permalink