InkSeal
Document authenticity
Private by design

Your file never leaves your browser — only its SHA-256 fingerprint is sent, never the document itself.

Tamper-evident

Every signing event is chained with SHA-256. Change a single byte and verification fails — instantly and visibly.

Independently provable

Sealed with an RFC-3161 timestamp and, when enabled, anchored to the Bitcoin blockchain — verifiable without trusting us.

Independent verification · SHA-256 hash chain
Made with ❤ in Arkansas · InkSeal