An encrypted file anyone can open CAPSULE
Put files in, choose a passphrase, and CAPSULE writes a single HTML page that decrypts itself in any browser. It is built in this tab; no server holds a copy.
1. Files to seal
No files yet.
2. Passphrase
There is no recovery. Send the passphrase by a different route from the capsule, never in the same email.
3. Build the capsule
Open a capsule here
Choose a capsule file and enter its passphrase.
How it works
CAPSULE is for sending an encrypted file to someone who has no special software. Add the files, choose a passphrase, and it writes a single HTML page that decrypts itself in any browser once the right passphrase is entered, so the recipient needs nothing installed. A strong passphrase matters, and if it is lost the files cannot be recovered.
The guides: Why Windows will not open your AES-encrypted zip and Send a file without it sitting on a server
Doing this often? The OBSCURA Sovereign Suite seals files for the person with the passphrase, locks files for several keyholders, and keeps a record of what was sent. On its own, US$4 a month; with everything else, US$9 a month or US$79 a year. 7 days free.