✦ Lyra

Fingerprint Verifier

A self-hosted, fully offline tool for comparing PGP, SSH, or any hex fingerprints — character by character.

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Overview

Lyra normalises and compares two fingerprint strings entirely in your browser. Nothing is ever sent to a server, logged, or stored. Paste your expected fingerprint and the one you received, hit compare, and instantly see whether they match — with every differing character clearly highlighted.

Built with the same visual language as Andromeda: a black-and-white liquid glass interface, an animated star field, and the DM Serif Display + Outfit type pairing.

Features

🔒 100% local	All comparison logic runs in plain JavaScript in your browser. No network requests, no telemetry, no backend processing of your data.
⚡ Smart normalisation	Optionally ignores case, whitespace/colons/hyphens, and common prefixes (0x, SHA256:, fingerprint:) before comparing.
🔍 Character-level diff	Uses an LCS (longest common subsequence) algorithm — the same technique behind diff — to show exactly which characters match, mismatch, or are missing from either string.
✨ Clear visual feedback	A green pulse with a particle burst on match; a red shake animation with a full character breakdown on mismatch.
🐳 Self-hosted	Single Docker container, no database, no external dependencies.

Quick start

Docker

docker run -d -p 3458:3000 --name lyra ghcr.io/matejselko/lyra:latest

Then open http://localhost:3458

Docker Compose

docker compose up -d

Local development (no Docker)

cd backend
npm install
npm start

Then open http://localhost:3000

How the comparison works

1. Normalisation — each string is processed according to the toggles you select:
   • Ignore case — lowercases both strings
   • Ignore spaces/formatting — strips whitespace, colons, and hyphens
   • Strip prefixes — removes 0x, SHA256:, SHA1:, MD5:, and fingerprint: prefixes
2. Diff — the normalised strings are compared character-by-character using a dynamic-programming LCS algorithm.
3. Match — if the strings are identical after normalisation, a green success animation plays.
4. Mismatch — if they differ, every character is colour-coded:
   • Grey — matches
   • Red — present in Fingerprint A, different or missing in B
   • Blue — present in Fingerprint B, different or missing in A

License

MIT

Note: This project is vibe-coded.