How to Encrypt Text with AES Online

Security guide · 3 min read

Quick Answer

Use the Text Encryption tool to encrypt your text with AES-256. Enter your text, set a strong password, and click Encrypt. Your data is encrypted locally in your browser.

Text Encryption Tool

Encrypt text with AES-256 password protection

Open Tool →

Step-by-Step Guide

Step 1: Enter Your Text

Go to the Text Encryption tool and type or paste the text you want to encrypt in the input field.

Step 2: Set a Strong Password

Enter a password in the password field. Use a strong, unique password that's at least 12 characters long with a mix of letters, numbers, and symbols.

Step 3: Select AES-256

Make sure AES-256 is selected as the encryption method. This is the default and most secure option.

Step 4: Click Encrypt

Click the Encrypt button. Your text will be encrypted and displayed in the result field as a Base64-encoded string.

Step 5: Copy and Share

Copy the encrypted result and share it. Remember to share the password through a different channel for security.

Password Best Practices

Important: If you lose your password, the encrypted text cannot be recovered. There is no backdoor or reset option.

Use at least 12 characters, preferably 16+
Mix uppercase, lowercase, numbers, and symbols
Don't use common words or phrases
Use a different password for each encryption
Store passwords securely (password manager recommended)

How to Decrypt

To decrypt your encrypted text:

Paste the encrypted text in the input field
Enter the same password used for encryption
Make sure AES-256 is selected
Click Decrypt

If decryption fails, check that you're using the correct password. The error "Wrong password or invalid encrypted text" means either the password is wrong or the encrypted text was corrupted.

How AES-256 Encryption Works

AES-256 (Advanced Encryption Standard with 256-bit key) is one of the most secure encryption methods available:

256-bit key: Provides extremely strong security against brute-force attacks
Symmetric encryption: Same password encrypts and decrypts
Browser-based: All processing happens locally in your browser
PBKDF2 key derivation: Your password is stretched into a secure encryption key
Random salt and IV: Each encryption produces different output even with the same text and password

Security Notes

Safe: Your text and password never leave your browser. All encryption happens locally using the Web Crypto API.

Never share the password through the same channel as the encrypted text
Don't send encrypted text and password in the same email or message
Consider using end-to-end encrypted messaging for sensitive communications
AES-256 is approved for classified US government data

Frequently Asked Questions

Is my data sent to a server? ▼

No. All encryption and decryption happens locally in your browser using the Web Crypto API. Your text and password never leave your device.

Can I recover my text if I lose the password? ▼

No. AES-256 encryption has no backdoor. If you lose your password, the encrypted text cannot be recovered. Always store your passwords securely.

Why does the same text produce different encrypted output? ▼

Each encryption uses a random salt and initialization vector (IV). This means the same text encrypted twice will produce different results, which is more secure. Both can still be decrypted with the same password.

Is AES-256 secure enough? ▼

Yes. AES-256 is considered one of the most secure encryption standards available. It's approved for protecting classified US government data and is virtually impossible to break with current technology when used with a strong password.