License XMLOffline licenses, verifiable anywhere

A readable XML license format secured with Ed25519 and Canonical XML 1.0.

Read the protocol specification

Open the playground

Offline verification

Applications verify signatures locally with a public key. No license server is required.

Tamper evident

Ed25519 signs the canonicalized payload. Changing signed data invalidates the signature.

Human readable

Licenses are UTF-8 XML with a documented, strict structure.

Documentation

Protocol specification: The complete normative definition of License XML v1.0.
API: JavaScript exports, options, and verification results.
How it works: key roles, signing, verification, and security boundaries.
Usage guide: install the package, use the API, and run the CLI.
Playground: sign and verify a demo license in your browser.