Cryptbin
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Share secrets without trusting the server

Paste text or code, encrypt it in your browser, and share a link — the decryption key never leaves the URL fragment.

Paste and get a linkHow it works
  1. 1

    Paste

    Drop sensitive text or code into the composer.

  2. 2

    Encrypt

    Cryptbin encrypts in your browser before anything is uploaded.

  3. 3

    Share link

    Send the secure URL. The decryption key stays in the fragment.

Beyond quick paste

More ways to use Cryptbin

Files, structured secrets, encrypted forms, and decrypt tools — pick a path below.

Create Secure Link
Write sensitive text, encrypt it in-browser, and generate a secure share URL.
Email SharingSign in
How signed-in email delivery works, limits, and what recipients receive.
Public-key notes
Encrypt to a recipient’s public key in the browser: RSA-OAEP, ECDSA signing, and no URL fragment key.

Security model

Why developers use Cryptbin

Share API keys, configs, and snippets without handing plaintext to the server.

  • Client-side encryption

    Content is encrypted in your browser before upload.

  • Keys stay in the URL

    The server stores ciphertext only — the key stays in the URL fragment.

  • Ephemeral by default

    Set expiry or burn-after-read for one-time shares.

  • Optional accounts

    Sign in for vault recovery and link metadata.

Read the full security model