Encrypt & Send
Compose a sensitive message, encrypt it in your browser, and share a secure viewer link with a 8-word spoken key — two separate channels, one unbreakable delivery.
Encrypt a Message
Your message and any attachments are encrypted in your browser before leaving your device. The server never sees the key.
The viewer link will be emailed to this address automatically.
Appears in the subject line of the email.
Up to 10 MB per file · 25 MB total · all file types accepted · encrypted before upload
You'll receive an email when the link is opened, when it's unlocked, and if a failed decryption attempt occurs. Emails contain no message content — only the event type and timestamp.
How it works
AES-256-GCM encryption runs entirely in your browser. Files are bundled with your message before encryption — the server only ever stores opaque ciphertext. The decryption key is split into a link fragment (in the URL, never sent to any server) and 8 spoken words you share with the recipient out-of-band.
All encryption happens in your browser. Office Guard servers store only the ciphertext — never the key, never the plaintext.