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Encrypt a file

Lock any file with a passphrase. The file and the passphrase never leave your device.

Processed in your browser. Your files stay on this device. Nothing is uploaded to our servers.

No ads or third-party scripts on this page; your password and data never leave your browser.

or drop it hereAny file type

Encryption happens on this device. Your file and password are never uploaded.

How to use Encrypt File

  1. 1

    Choose the file you want to protect.

  2. 2

    Enter a strong passphrase and confirm it.

  3. 3

    Encrypt and save the .enc file.

About Encrypt File

Encryption lets you store or send a file so that only someone with the passphrase can open it. Your passphrase is turned into a 256-bit key with PBKDF2-SHA256 (600,000 iterations) and a random salt, and the file is encrypted with AES-256-GCM in authenticated chunks, so any change to the encrypted file is detected. Everything happens in your browser: neither the file nor the passphrase is sent anywhere, and this page loads no ads or third-party scripts. There is no password recovery. If you forget the passphrase, the data cannot be restored by anyone.

Frequently asked questions

What if I forget my passphrase?

The file cannot be decrypted. There is no recovery or backdoor, so store your passphrase safely.

Can I encrypt large files?

Yes. Files are processed in chunks. In browsers that support saving directly to disk, the output is written as it is produced to save memory.

How do I open the file later?

Use the Decrypt File tool on this site with the same passphrase.

What makes a good passphrase?

Use at least four random words or 14 or more mixed characters, and do not reuse a password from another account.