File Decryptor

Decrypt files that were encrypted with the File Encryptor tool.

Unlock files

Secure Decryption

All decryption happens locally in your browser. Your files and passwords are never sent to any server.

Click or drag encrypted file

Files with .encrypted extension

This tool decrypts files that were encrypted using the File Encryptor tool.

Make sure you have the correct password - there is no way to recover files without it.

About

About the File Decryptor

The File Decryptor opens files that were encrypted with this site's File Encryptor and restores the original. Select the .encrypted file, enter the password used to encrypt it, and download the result. It uses AES-256-GCM with a key derived from your password via PBKDF2, all through your browser's built-in WebCrypto — the file and the password never leave your device. Note that this is not a general-purpose decryptor: it only reads the format the matching File Encryptor writes.

How to use the File Decryptor

  1. 1Select the .encrypted file you want to open, by clicking or dragging it in.
  2. 2Enter the exact password that was used to encrypt it.
  3. 3Press Decrypt — the key is derived from your password and the file is decrypted locally.
  4. 4Check the original filename and size shown on the success panel.
  5. 5Download the decrypted file.

Common use cases

  • Opening a file you encrypted earlier with the File Encryptor
  • Recovering a document someone sent you as an .encrypted file, once you have the password
  • Checking that an encrypted backup still opens correctly
  • Decrypting a sensitive file on a machine where you'd rather not install software
  • Confirming an encrypted file hasn't been tampered with in transit

Frequently asked questions

Can it decrypt any encrypted file?

No. It only opens files produced by the File Encryptor tool on this site, which writes a specific layout: a random salt and initialisation vector followed by AES-256-GCM ciphertext. Files from GPG, OpenSSL, 7-Zip, password-protected PDFs, or any other software will not open here.

The password is definitely right, but it still fails. Why?

The tool shows one message for every kind of failure, so 'check your password' can also mean the file is corrupt or truncated, or wasn't produced by the matching File Encryptor. If you're certain the password is correct, re-download or re-copy the encrypted file — an incomplete transfer is the most common cause.

What happens if I lose the password?

The file cannot be recovered. The key is derived from your password alone: there's no backdoor, no reset, and no copy of your password anywhere. That's precisely what makes the encryption worth trusting, and why the password needs to live somewhere safe.

Is my file uploaded to a server?

No. Decryption runs entirely in your browser via WebCrypto. The encrypted file, the password, and the decrypted result all stay on your device.

What encryption does it use?

AES-256 in GCM mode, with the key derived from your password using PBKDF2 (SHA-256, 100,000 iterations) and a random salt stored in the file. GCM also authenticates the data, so a file that has been altered or corrupted fails to decrypt rather than quietly producing damaged output.

Your data never leaves your browser • No cookies • Works offline after your first visit

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