PDF Mikata

Encrypt and Decrypt a File with a Password

To protect important files before sending them.

Your files are never uploaded. Everything is processed on this device.

  1. 1Choose a file
  2. 2Set a password
  3. 3Save
Done

🔒 Your files are never sent to an external server. Everything is processed safely inside this browser.

How to use

  1. Tap "Choose a file" and select the file to encrypt (or a .pmk file to decrypt).
  2. Choose Encrypt or Decrypt and enter a password.
  3. Tap "Encrypt and save" (or "Decrypt and save") and save.

How it works

  • Files are encrypted with AES-256-GCM, a widely used method. The key is derived from the password with PBKDF2.
  • An encrypted file gets a ".pmk" extension. The original file name is stored inside.
  • Only this tool can decrypt it. Other software cannot open it.

Notes

  • If you forget the password, the file can never be opened again. Keep it somewhere safe.
  • Use at least 8 characters. Longer is safer.
  • When you share the file, send the password by a different route (such as a phone call).

FAQ

Are my files uploaded anywhere?

No. Everything is processed inside the browser on your device.

Is the password saved?

No. The password is neither stored nor sent.

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Guides for this tool

How to Encrypt a File with a Password (Free, Works on a Phone)How to Restore an Encrypted FileEncrypting an Important File Before Emailing ItHow to Choose a Safe PasswordHow This Differs from a ZIP PasswordFile Size Limits and CautionsEncrypting Without Uploading Your File

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