How secure is the encryption process?

It uses professional 256-bit AES-GCM cryptography. Your password is expanded into a key using PBKDF2 with 100,000 iterations, ensuring military-grade offline security against brute-force attacks.

Can FlexiFile recover my password?

No. Since all encryption and decryption run entirely inside your browser sandbox and no passwords are sent to any remote server, it is impossible for us to recover lost passwords.

Home Developer & Security StudioLocal File Encryptor

Local File Encryptor

Developer

Secure files offline with professional AES-GCM 256-bit cryptography and PBKDF2 keys.

Select Target File

Select file to Encrypt

Processing happens 100% in your browser.

Passphrase (Key)

Write this down! We cannot recover files if you lose the password.

Local Sandbox Security

All cryptography operations run exclusively in your browser. File contents and passwords are never sent to any server.

We use 256-bit AES-GCM and derive keys using PBKDF2 (100k rounds) to block brute-force attacks. However, weak passwords are still vulnerable. Choose complex passphrases.

How to use the Local File Encryptor

Follow these simple steps to process your files locally in seconds.

Select the file you want to protect, and toggle the mode (Encrypt or Decrypt).

Enter your custom password key. Ensure you note it down, as there is no password retrieval.

Click the Process button to run the Web Crypto cipher, and download the protected `.enc` file.

100% Client-Side

All calculations run exclusively inside your browser. No files are ever sent to our servers.

Private & Secure

Your data remains entirely yours. Ideal for processing sensitive business or personal files safely.

No Limits, No Fees

No account registration, no file size limitations, and no watermarks added to final results.

Frequently Asked Questions

Got questions about using the Local File Encryptor? Find answers here.