Lock & Encrypt

What is AES-256-GCM Encryption?

AES (Advanced Encryption Standard) with a 256-bit key length is a symmetric encryption algorithm established by the U.S. National Institute of Standards and Technology (NIST). It is the global gold-standard for cryptography, actively utilized by the military, banking institutions, and major cloud providers to secure highly classified data. The "GCM" (Galois/Counter Mode) extension ensures not only that your data is encrypted, but also provides authenticated encryption—meaning if a malicious actor alters a single byte of your encrypted file, the decryption process will instantly fail, protecting you against tampering.

Why use a 100% Client Side File Encryptor?

If you use an online tool to encrypt your files, you are fundamentally defeating the purpose of encryption. When you upload a file and a password to a web server, that remote server gains absolute access to your raw, unencrypted data. Even if they claim to delete it, your sensitive information has traversed the internet and resided on third-party hardware.

Our Lock & Encrypt tool guarantees a true Zero-Knowledge environment. By utilizing highly optimized WebAssembly (WASM), all cryptographic operations—including key derivation and the AES-256-GCM cipher—are executed exclusively within your browser's local memory. Your files, your password, and your data never touch a network connection.

Features & Technical Specs

• Universal Format Support: Drop ANY file type into the workspace (PDFs, ZIP archives, raw text, databases, or images) to generate a secure `.encrypted` payload.
• Offline Capability: Because the cryptographic logic is bundled entirely into the local WASM binary, you can physically disconnect your internet connection and still encrypt/decrypt your critical files with absolute security.
• No File Size Limits: Standard web tools limit your uploads. Because our tool processes data locally in RAM, you are limited only by your computer's available memory.