Encrypt / Decrypt
AES encryption & decryption
⚠️ Remember your key! Without it, you cannot decrypt your data.
🔐 About AES-256-GCM Encryption
- • AES-256 — Military-grade encryption standard
- • GCM Mode — Provides both encryption and authentication
- • PBKDF2 — Secure key derivation from your password
- • 100% Client-Side — Your data never leaves your browser
- • Hash ≠ Encryption — Unlike hashing, encryption is reversible with the key
About AES Encrypt / Decrypt Tool
1What is it?
Securely encrypt and decrypt text using AES-256-GCM encryption. Your data never leaves your browser — all processing happens client-side.
2Use Cases
- Encrypt sensitive messages before sharing
- Secure API keys and passwords
- Encrypt configuration data
- Protect confidential notes
- Secure communication channels
3Examples
Encrypt text
Input
My secret message
Output
U2FsdGVkX1...encrypted...base64
Decrypt text
Input
U2FsdGVkX1...encrypted...base64
Output
My secret message
?Frequently Asked Questions
What's the difference between encryption and hashing?
Encryption is reversible — you can decrypt data back to its original form using the key. Hashing is one-way — you cannot reverse a hash to get the original data. Use encryption when you need to retrieve the original data later, and hashing for passwords or data integrity checks.
Is AES-256 secure?
Yes! AES-256 is a military-grade encryption standard used by governments and organizations worldwide. It would take billions of years to crack with current technology.
What happens if I lose my key?
If you lose your secret key, you cannot decrypt your data. There's no way to recover it. Always store your encryption keys safely!
Is my data sent to any server?
No! All encryption and decryption happens entirely in your browser using the Web Crypto API. Your data, key, and encrypted output never leave your device.