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AES Encryption Tool

LOCAL · Browser-Only

Encrypt and decrypt text using AES-256 encryption

AES Mode

Key Size

Output Format

GCM provides authenticated encryption - it detects if the ciphertext has been tampered with. Recommended for most use cases.

Plaintext

PasswordUse raw key (hex)

Press Ctrl + Enter to encrypt.

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What is AES Encryption Tool?

Free online AES encryption tool to encrypt sensitive text using AES-256-GCM encryption with a password of your choice.

Decrypt previously encrypted messages by entering the same password. Uses the Web Crypto API for secure, browser-native cryptography. Output is Base64-encoded for easy sharing. Your data and password never leave your browser. No signup required.

How to Use AES Encryption Tool

1Enter the text you want to encrypt
2Set a strong password (both parties need this)
3Click Encrypt to get the Base64-encoded ciphertext
4To decrypt, paste the ciphertext and enter the same password

Frequently Asked Questions

What is AES-256 encryption?

AES-256 is the Advanced Encryption Standard with a 256-bit key length. It's the same encryption used by governments, banks, and security systems worldwide. It's considered unbreakable with current technology.

Is this tool secure?

Yes. Encryption runs natively in your browser using AES-256-GCM, which provides both confidentiality and authenticity. Your password and data never leave your device.

How do I share encrypted text?

Copy the Base64-encoded output and share it through any channel (email, chat, etc.). The recipient pastes it into the decrypt tab and enters the same password you used to encrypt.

What happens if I forget the password I encrypted with?

There is no recovery. AES-256-GCM is designed so the ciphertext cannot be decrypted without the exact password, so store it somewhere safe before sharing the encrypted text.

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