Raw Bytes

The entropy itself, in hex, base64 or binary.

numbers.bytes · v1 · renderer text

6e13fd6f128374a204c78c48e960ad7adb2f32574e4a963011e2741edcea0654

Controls · from schema()

How many bytes

1 1024

16 bytes is an AES-128 key, 32 an AES-256 key. Both are more randomness than anything you own needs.

Encoding

Uppercase hex

Group every

0 16

Insert a space every n bytes. Zero is one unbroken string, which is what you want if you are about to paste it.

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 Bitcoin Proof-of-Work.

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.

entropy in

16 bytes

stream used

32 bytes

entropy out

256.0 bits

rejections

duration

61 µs

bytes

distinct byte values

measured bits per byte

4.94

sensitive

yes

Seed receipt

Class B · Public beacon cached

Bitcoin block 973,812 — 19 leading zeros of proof-of-work, found about ten minutes ago.

Published openly — anyone can look this value up after the fact.

source: Bitcoin Proof-of-Work
observed: 2026-10-30T11:13:18+00:00
latency: 0ms
mixed with: csprng — always

https://mempool.space/block/00000000000000000001437feed9aae961c1ad1a4747d5b76de354fe6846c2cf ↗

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 · numbers.bytes is marked sensitive

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

Raw Bytes

Result

Measurements

Seed receipt

No permalink