Documentation

Simple, yet powerful. Learn how to use Sealed Letter and its features.

Some messages, documents, and instructions are not meant to be shared right away. They’re created to be kept safe and made available only under specific circumstances.

Sealed Letter provides a secure way to write, store, and control access to important content — whether you want to share meaningful words, pass on essential documents, provide step-by-step guidance, or enable emergency (“break-glass”) access.

Built as a mobile-first platform with strong privacy protections, Sealed Letter focuses on clarity, trust, and user control, without functioning as a general messaging or communication service