Secure File Encryptor
Files are encrypted locally in your browser using AES-256-GCM and never uploaded to any server.
Processing...
Processing locally in your browser.
How It Works: 100% Client-Side Processing
Traditional file sharing platforms force you to upload your files to their servers, making your data vulnerable to data breaches, hacks, and unauthorized tracking. We eliminate the server entirely.
1. Choose File
Select a file. It is read directly into your device's temporary RAM.
2. Generate Key
A secure cryptographic key is derived entirely from your password.
3. Encrypt Locally
Your browser's engine locks the data. The original file is scrubbed.
4. Download
The encrypted file is compiled and saved directly to your hard drive.
Technical Security Details
Transparency is the foundation of cryptography. This tool is built with a no-login, no-tracking, privacy-first architecture utilizing native web technologies.
- Web Crypto API: All cryptographic operations are offloaded to the native `window.crypto.subtle` API provided by your browser, ensuring hardware-accelerated, tamper-proof execution.
- AES-256-GCM: We utilize the Advanced Encryption Standard (AES) with a 256-bit key. Galois/Counter Mode (GCM) provides authenticated encryption, meaning any tampering with the encrypted file will automatically trigger a decryption failure.
- PBKDF2 Key Derivation: Your plain-text password is never used directly as an encryption key. It is hashed alongside a cryptographic salt using PBKDF2 (SHA-256) with 100,000 iterations to heavily mitigate brute-force attacks.
- Random IV Generation: A cryptographically secure pseudo-random Initialization Vector (IV) is uniquely generated for every file. This guarantees that encrypting the same file twice produces completely different ciphertext.
Why Local Encryption Matters
What is AES-256 Encryption?
AES-256 (Advanced Encryption Standard) is a symmetric encryption algorithm widely adopted by governments, banks, and security professionals globally. "256" refers to the key length meaning there are 2^256 possible key combinations. To put that into perspective, it would take the world's most powerful supercomputers billions of years to crack an AES-256 key via brute force.
When should you encrypt files?
You should encrypt any file containing personally identifiable information (PII) before sending it via email, WhatsApp, or cloud storage. Common examples include:
• Tax returns and W-2 forms
• Scans of passports, driver's licenses, or SSN cards
• Financial statements and bank details
• Plain text documents containing passwords or seed phrases
Prove it works offline.
We encourage you to verify our claims. Load this webpage, turn off your Wi-Fi or unplug your ethernet cable, and try encrypting a file. Because the JavaScript executes entirely inside your browser, the tool will continue to function perfectly without an active internet connection. We are fundamentally incapable of accessing your data.