Send files securely

Large files, hashed and verified end to end, stored on BlckRhino infrastructure only. Recipients get an expiring link by email — no account needed.

1 · Choose your files

Drop files here or click to choose them Nothing leaves your browser until you press Send. Each file is then hashed locally, uploaded in verified chunks and checked again on our server.

2 · Who is it for?

Recipient email

They do not need an account. We email them a single expiring link — it is never shown here, so nobody looking over your shoulder can take it.

Message optional

Require recipient email verification — before the download opens, they enter a 6-digit code we email to that same address. Stops a forwarded or mistyped link handing the files to somebody else.

3 · Confirm it is you

Only verified accounts can send. Sign in right here — your files stay put while you do.

Your email

Authenticator code

No account yet? Create a free one — it takes about a minute and needs an authenticator app.

Or continue with an account you already have:

Verified on arrival: every chunk and every complete file was SHA-256 checked after upload.
File	Size

Manage your transfers

Protected transferHTTPS transport

Integrity verifiedSHA-256 hashing

Resumable uploadVerified chunks