How To Fix AES Encrypt / Decrypt

How can I encrypt text with AES-256-GCM safely online?

Encrypt and decrypt text using military-grade AES-GCM (Galois/Counter Mode) encryption directly in your browser. This utility uses the Web Crypto API, ensuring that your plaintext and passwords never leave your machine.

Why AES-256-GCM is the Gold Standard

AES (Advanced Encryption Standard) is the industry benchmark for symmetric encryption. However, the mode of operation is just as important as the algorithm itself.

•Authenticated Encryption: Unlike older modes like CBC, GCM provides "Authenticated Encryption." This means it generates an authentication tag that verifies the integrity of the data. If even a single bit is changed in the ciphertext, decryption will fail, preventing padding oracle attacks and bit-flipping.

•256-bit Security: While 128-bit is mathematically secure for now, 256-bit provides a massive safety margin against future quantum computing threats.

•Hardware Acceleration: Most modern CPUs (Intel AES-NI, Apple Silicon) have built-in instructions for AES-GCM, making it incredibly fast even for large payloads.

Cryptographic Best Practices Implemented

Our tool follows strict NIST guidelines for secure implementation:

•PBKDF2 Key Derivation: We don't use your password directly as a key. Instead, we use PBKDF2 with 100,000 iterations of SHA-256 and a random salt. This makes "brute-forcing" your password exponentially harder for attackers.

•Unique Initialization Vectors (IV): Every single encryption generates a new, random 12-byte IV. Even if you encrypt the same text with the same password twice, the output will be completely different.

•Zero-Persistence: We do not store keys, salts, or passwords. Once you close the tab, the memory is cleared.

How to use the AES-256-GCM Tool:

1. Choose Mode: Toggle between Encrypt and Decrypt. 2. Enter Password: Use a strong passphrase. The tool will derive a 256-bit key using PBKDF2. 3. Input Data: Paste your sensitive text or the Base64-encoded ciphertext. 4. Secure Output: The resulting string contains the [Salt] + [IV] + [Ciphertext] + [Auth Tag], all packed into a single portable Base64 string.

Security Warning

Always store your password in a secure password manager. There is no "Password Reset" for AES encryption; if you lose the key, the data is cryptographically unrecoverable. 100% private, 100% browser-delivered, and perfect for sharing sensitive secrets over insecure channels like Slack or Email.

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FAQ: How To Fix AES Encrypt / Decrypt

Does it support AES-256-GCM authentication?

Yes, the How To Fix AES Encrypt / Decrypt is fully optimized for aes-256-gcm authentication using our zero-knowledge local engine.

Does it support PBKDF2 key derivation?

Yes, the How To Fix AES Encrypt / Decrypt is fully optimized for pbkdf2 key derivation using our zero-knowledge local engine.

Does it support Hardware-accelerated Wasm?

Yes, the How To Fix AES Encrypt / Decrypt is fully optimized for hardware-accelerated wasm using our zero-knowledge local engine.

Does it support Salt/IV management?

Yes, the How To Fix AES Encrypt / Decrypt is fully optimized for salt/iv management using our zero-knowledge local engine.