How to Use the Client-Side File Encryptor & Decryptor
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1
Select mode: "Encrypt File" or "Decrypt File".
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2
Upload any file (PDF, photo, document, spreadsheet, zip).
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3
Enter a strong passphrase (used with PBKDF2 100,000 iterations to derive AES-256 key).
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4
Click "Encrypt and Download" to save the .enc protected file.
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5
To unlock, upload the .enc file with your passphrase and click "Decrypt".
Practical Example & Use Case
Common Real-World Scenario
Safeguarding confidential tax returns or identity documents before backing them up to cloud drives.
Technical Notes & Limitations
Browser Engine Architecture
Uses native browser Web Crypto API (SubtleCrypto AES-GCM). There is no backdoor—if you forget your password, the file cannot be decrypted.
Frequently Asked Questions
Does my file or password ever leave my device?
Never. Encryption and decryption occur strictly in your local device RAM.