Encrypt File

Protect any file with a password (AES-256) or decrypt it. Free, no sign-up, files stay on your device.

Choose a file to encrypt or decryptor drag and drop a file here

🔒 100% private — processing happens in your browser. Nothing is uploaded.

How to use the file encryption tool

  1. Choose any file. Files encrypted here (.gkenc) are recognised automatically.
  2. Enter a strong password (twice when encrypting).
  3. Click Encrypt or Decrypt — the result downloads immediately.

Send a contract, a scan of your documents or a backup through email or cloud storage without anyone else being able to read it. The file is encrypted with AES-256-GCM using your browser’s built-in Web Crypto API; the key is derived from your password with PBKDF2 (250,000 rounds) and a random salt, and the original file name is stored inside the encrypted data. The password never leaves this page and we cannot recover it for you — share it with the recipient through a different channel.

FAQ

Can I open a .gkenc file without this website?

The format is open: a 9-byte header “GETKGENC1”, 16-byte salt, 12-byte IV and the AES-GCM ciphertext. Any tool that supports PBKDF2-SHA256 and AES-GCM can decrypt it, but the easiest way is this page.

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