entviz¶

entviz turns a high-entropy value — a cryptographic key or signature, a UUID, a blockchain address, a post-quantum key, a genome — into a compact SVG diagram that an ordinary person with reasonably good vision can compare at a glance. The goal is simple: let a human decide "are these two blobs of entropy the same or different?" without reading 88 characters of base64 one symbol at a time.

Every value is rendered across several redundant visual channels — text cells, a per-cell surround pattern, nucleus colors, a fingerprint-derived color bar, blank-cell markers, and an ellipse overlay — so that even a single-bit difference in the input is obvious, and so that color-blind viewers and monochrome displays still get a reliable signal.

An entviz rendering of this repository's root commit hash — This repository itself, rendered as an entviz of its own root commit hash.

Explore¶

Specification — the full algorithm (current: v5): normalization, tokenization, the fingerprint, geometry, and every visual channel.
Gallery — entvizes across real input types (UUIDs, hex, blockchain addresses, SSH keys, ULIDs, LEIs, snowflakes) and avalanche pairs.
Paper — the longer-form analysis and design rationale.
Developers (README on GitHub) — install with uv, run the CLI, run the tests, and cut releases.

A threat model covering the comparison guarantees is also available.

At a glance¶

Losslessly represents up to 512 bits in the text channel; larger inputs show head + fingerprint-selected middle slices + tail, and bind the whole input through the fingerprint.
Amplifies single-bit differences via a SHA-512 fingerprint, even when the input itself has no avalanche effect.
Usable under red-green, blue-yellow, and complete color blindness.
Trivial to implement, with no significant dependencies.