SiliconWit Seal

A simple, polished desktop app for encrypting and decrypting files with OpenPGP.

Designed for people who need secure file sharing (for example, sending exam papers by email) but shouldn't have to learn GPG on the command line. Files produced are standard OpenPGP (RFC 4880), so recipients can open them with Kleopatra, GPG Suite, Thunderbird, Mailvelope, or any other OpenPGP tool.

Casual / short name: Siwit Seal. In-app name: Seal.

Get it

Download for your OS Quick start

What it does

• Drag-drop files → auto-zip, encrypt, ready to attach
• Drag-drop .gpg / .pgp → auto-decrypt, unzipped contents
• Auto-encrypt-to-self so you can always open what you sent
• Optional signing (off by default; turn on per-send when you want recipients to verify it came from you)
• First-run onboarding: generate key, export private-key backup and revocation cert
• Contacts manager with fingerprint verification (human-friendly word list)
• Bundled GnuPG, no separate install, zero friction on Windows, macOS, Linux

Status

Pre-1.0. Expect rapid iteration. See Releases for downloads and change notes.