File Decryptor (AES-256)
Decrypt and restore your .enc files securely in your browser. Standard AES-256-GCM client-side decryption.
Drag & drop your .enc file here or click to browse
Free Online File Decryptor – Decrypt AES-256 Protected Files
Restore and open your encrypted files easily with our free client-side file decryptor. This tool allows you to decrypt files ending with .enc that were secured using AES-256-GCM. By entering the correct password, the tool extracts the cryptographic salt and IV embedded in the file, derives the original key, and decrypts the data directly in your browser. Since it operates entirely offline, your password and files are kept 100% private.
How to Decrypt a File Online
- Select or drag & drop the .enc encrypted file in the dropzone above.
- Enter the exact password that was used during the encryption phase.
- Click 'Decrypt File'. The Web Crypto API verifies the authenticity tag and decrypts the payload in your browser.
- Download your restored original file instantly.
Key Features of Our Online Decryptor
Local Processing Only
Like the encryptor, all calculations run client-side. The file never leaves your machine, preventing any interception or server leaks.
Standard AES-256-GCM
This tool works with any files encrypted using AES-256-GCM with a PBKDF2 derived key matching our binary specification (salt len + salt + IV len + IV + ciphertext).
Works Offline
You can disconnect your device from the internet once the tool is loaded to perform complete offline file decryption.
100% Free & Unlimited
Restore files of any size without limits, premium accounts, or advertisements.
Frequently Asked Questions (FAQ)
Is this file decryptor free?
Yes! The tool is completely free, client-side, and unlimited.
Are my files or passwords uploaded to a server?
No. All password processing and file decryption occur inside your browser using JavaScript. No network requests are made with your file data.
Why does decryption fail with an error?
Decryption failure usually happens if the password is incorrect or if the file was modified/corrupted. AES-GCM includes built-in integrity checks; if even a single bit of the file or password is wrong, decryption fails to prevent tampered data from loading.
What is the expected file format?
The decryptor expects a binary file starting with a 1-byte salt length, followed by the salt bytes, a 1-byte IV length, the IV bytes, and then the ciphertext (which includes the 16-byte GCM authentication tag at the end).
Can I decrypt files created by other programs?
Yes, as long as they package the file according to our binary structure and derive the key using PBKDF2 (100,000 iterations, HMAC-SHA-256, 32-byte salt, 256-bit key) and AES-256-GCM.