Seal, open, or send a file. Content only ever leaves your browser encrypted.
Sealing scrambles a file so nothing inside it can be read without the right key — the diamond cracks if the wrong password is used or the file has been altered. A sealed download needs a password you set yourself, and you're responsible for sharing it separately. A share link needs no password at all — it expires on its own, can only be opened a limited number of times, and you can shut it off early at any time.
Your download started automatically. The extension is just a label — it isn't required to open the file, and needs no app installed. Share it however you'd normally send something; share the password separately.
No password to share — the link itself is the credential. It expires automatically and can only be opened a limited number of times. Diamond Digit's server stores only the encrypted bytes — never the key, never the content, never the recipient's email.
This preview only exists in your browser's memory for this tab. Nothing is written to disk unless you choose to save it. This can't prevent someone from screenshotting or recording their screen — no viewer can.