AES Encrypt & Decrypt
Encrypt and decrypt text using AES-256-GCM with PBKDF2 key derivation — entirely in your browser.
Use a long, unique passphrase. It is derived into a 256-bit key using PBKDF2 (100k iterations, SHA-256).
Output will appear here after processing.
How It Works
AES-256-GCM
Military-grade authenticated encryption. GCM mode detects any tampering with the ciphertext, so you know decryption results are trustworthy.
PBKDF2 Key Derivation
Your passphrase is never used directly. PBKDF2 with 100,000 iterations and SHA-256 transforms it into a strong 256-bit encryption key with a unique random salt.
Browser-Only
All cryptographic operations run via the browser's native Web Crypto API. Zero server calls — your data never leaves your device.
What is AES Encrypt & Decrypt?
AES Encrypt & Decrypt is a browser-based cryptography tool that lets you encrypt and decrypt text using AES-256-GCM, one of the strongest symmetric encryption standards available today. AES stands for Advanced Encryption Standard, and the 256-bit key length paired with GCM (Galois/Counter Mode) provides both confidentiality and data integrity verification, making it the same algorithm trusted by governments, banks, and security-conscious developers worldwide.
Because all encryption and decryption happens entirely inside your browser using the Web Crypto API, your plaintext and your secret key never leave your device. There is no server involved, no data stored, and no account required. This makes the tool ideal for encrypting sensitive notes, configuration values, API keys, or any personal text you want to share securely.
AES-256-GCM uses a random initialization vector (IV) for each encryption operation, so encrypting the same text twice produces different ciphertext every time. The output is Base64-encoded for easy copying and sharing. To decrypt, simply paste the ciphertext and enter the same passphrase used during encryption. This tool is a practical way to understand and use modern symmetric encryption without setting up any libraries or running server-side code.
How to Use AES Encrypt & Decrypt
- Enter your plaintext
Type or paste the text you want to encrypt into the input field.
- Set a passphrase
Enter a strong secret passphrase. This key is used to derive the AES-256 encryption key — keep it safe.
- Encrypt or decrypt
Click Encrypt to get Base64 ciphertext, or paste ciphertext and click Decrypt to recover the original text.
- Copy the result
Copy the encrypted or decrypted output to your clipboard for use elsewhere.
Key Benefits
Uses the same 256-bit encryption standard trusted by financial institutions and security professionals globally.
Your text and passphrase never leave your browser — zero server calls, zero data retention.
A fresh initialization vector is generated each time, ensuring ciphertext is never predictable or repeated.
Works instantly in any modern browser with no libraries to install or accounts to create.
Frequently Asked Questions
Yes. AES-256-GCM is a widely audited, NIST-approved standard used in TLS, file encryption, and secure messaging. The security depends heavily on choosing a strong, secret passphrase.
The data cannot be recovered without the passphrase. AES encryption is a one-way lock without the key — there is no backdoor or recovery mechanism.
A random initialization vector (IV) is generated for every encryption operation and embedded in the output. This prevents pattern analysis and is a security best practice.
This tool is designed for text. For file encryption, dedicated tools like VeraCrypt or GPG are better suited to handle binary data and large file sizes.