File encryption converts readable data into cipher text using cryptographic algorithms. Decryption reverts the cipher into the original data. You apply a secret password, which the algorithm transforms into a cryptographic key. The key locks or unlocks information. Modern browsers support client-side encryption, keeping data local. This tool implements browser-side algorithms only.
You use file encryption to protect confidential contracts, medical records, or personal photos during storage or transfer. The tool simplifies that process. Drag-and-drop, choose an algorithm, and enter a password. The service operates entirely offline, preventing third-party exposure. Encrypt before emailing, decrypt after downloading. The symmetric workflow enables quick, repeated use for everyday tasks.
Encrypted files retain original extensions with .enc appended, easing identification. You can copy the Base64 cipher for safe text transport through chat or configuration files. A single password governs both encryption and decryption, reducing cognitive overhead. The compact implementation loads fast on mobile networks. Businesses meet data-protection guidelines without backend integration. Students secure project files before cloud backups.
Technical Details:
You configure parameters locally; the algorithm handles the rest.
- Drag-and-drop interface with real-time status icons.
- Supports AES, DES, TripleDES, RC4, Rabbit, and Rabbit Legacy algorithms.
- Derives a 256-bit key from your password using SHA-256 hashing.
- Performs encryption and decryption entirely in the browser memory.
- Outputs downloadable .enc files and optional Base64 cipher text.
- Automatically renames decrypted files by removing the .enc suffix.
- Uses ECB mode for block algorithms, simplifying key management.
- Vue reactivity updates buttons and progress without reloading.
Sample Scenario
You encrypt a 1 MB PDF with AES and the password “summer2025”. The encrypted file grows by 2 %.
| Step | Expression | Result |
|---|---|---|
| Key | SHA-256(“summer2025”) | 256-bit digest |
| Cipher | AES-Encrypt(PDF, Key) | 1.02 MB .enc |
| Verification | AES-Decrypt(Cipher, Key) | Original PDF |
Step-by-Step Guide:
Follow these steps to secure or unlock your files.
- Open the app page.Tip
- Drag a file into the drop zone or click to browse.
- Select an algorithm from the dropdown.
- Enter a strong password of at least twelve characters.Caution
- Choose Encrypt or Decrypt using the radio buttons.
- Press the action button and wait for processing.
- Download the resulting file or copy the Base64 cipher.
FAQ:
Find quick answers to common questions.
Does the tool upload my files?
No. All processing occurs within your browser memory.
Which algorithm is safest?
AES offers strong, industry-accepted security when paired with a robust password.
Can I recover my file without the password?
No. The password derives the key. Without it, decryption is infeasible.
Why does the encrypted file look larger?
Base64 encoding and padding add overhead, typically 0–4 % extra size.
Is ECB mode vulnerable?
ECB reveals patterns in large, structured files. Consider splitting or zipping files first.
Troubleshooting:
Resolve issues quickly with these checks.
- Wrong password: Re-enter carefully. Passwords are case-sensitive.
- Unsupported file type: Any binary is accepted; check browser restrictions.
- Stuck on “Processing…”: Refresh the page and retry with a smaller file.
- Invalid Base64 output: Ensure you did not modify the cipher text.
- Download blocked: Disable aggressive popup or download blockers.
Advanced Tips:
Enhance security and efficiency with expert practices.
- Compress files before encryption to obscure structural patterns.
- Create passwords with three unrelated words and symbols.
- Store passwords in an offline manager rather than browsers.
- Verify file integrity using a hash after decryption.
- Batch-encrypt multiple files inside a zip archive for speed.
Glossary:
Understand key terms quickly.
- Encryption
- Process converting plaintext into unreadable cipher text.
- Decryption
- Reverse process converting cipher text back to plaintext.
- Algorithm
- Step-by-step procedure used to transform or restore data.
- Key
- Secret value derived from your password that locks or unlocks data.
- SHA-256
- Hash function producing a 256-bit digest used here for key derivation.