🔒 Text encryption/decryption

Text is encrypted and decrypted using a variety of algorithms including AES-GCM encryption, Caesar cipher, and Vigenere cipher. All processing is completed within the browser, and no data is transmitted externally.

AES-GCM 256-bit encryption. Derives the key from the password and strongly protects the text.

Supported Algorithm

  • AES-GCM - Password-based 256-bit encryption (PBKDF2 key derivation)
  • Caesar Cipher - Classical ciphers that shift letters (including ROT13)
  • Vigenere cipher - a multisyllabic substitution cipher using keywords
  • String inversion - reverses text character order
  • Binary conversion - Converts each character to its 8-bit 0/1 representation
  • Hexadecimal Conversion - Convert each character to its hexadecimal (Hex) representation

All processing runs in your browser. No data is sent externally.

Usage and Application Examples

  • Encrypt and securely email text containing sensitive information with AES-GCM
  • Encrypted storage of passwords and API keys
  • Learn and experience classical ciphers with the Caesar cipher and the Vigenere cipher
  • Check data representation by converting text to binary (binary) or hexadecimal
  • Perform simple character conversion with string inversion
  • Security measures when sharing sensitive data between teams

What is Text Encrypt?

Text Encrypt is a free browser-based encryption tool that lets you secure text using multiple algorithms including AES-GCM, Caesar cipher, Vigenère cipher, and others. Everything happens locally in your browser—no data is sent to any server. It's perfect for anyone who needs quick, private encryption without installation or registration.

How to Use

Enter the text you want to encrypt in the input field. Select your preferred encryption algorithm from the dropdown menu—AES-GCM offers the strongest security, while Caesar and Vigenère are simpler options. Set a password or key that you'll use for encryption. Click the encrypt button to generate your encrypted text. To decrypt, paste the encrypted text, choose the same algorithm and key, then click decrypt. The tool displays results instantly, and you can copy the encrypted output to your clipboard with a single click.

Use Cases

• Securing sensitive emails: Encrypt text before sending through email to ensure only the intended recipient with the password can read it
• Password storage: Use encryption to store passwords in a text file with a master key, avoiding plaintext password files
• Private notes: Encrypt personal journal entries, business secrets, or confidential information before saving to cloud storage
• Data sharing: Encrypt documents before uploading to shared cloud services, adding an extra layer of security

Tips & Insights

AES-GCM provides military-grade encryption and should be your first choice for sensitive data. Remember that your password strength directly affects security—use long, random passwords for important data. Caesar and Vigenère ciphers are historical methods useful for learning but not suitable for modern security needs. Always test your password on a non-critical sample first. Browser-based encryption means your key never leaves your device, making this safer than server-side encryption tools.

Frequently Asked Questions

How do I use text encryption?

Select an algorithm, enter the text (and password or key if needed) and press the Encrypt button. You can decrypt using the same algorithm and key on the Decryption tab.

Which algorithm is the safest?

AES-GCM is the most secure; it uses 256-bit encryption and PBKDF2 key derivation and provides very high security when combined with a strong password. Caesar and Vigenere ciphers are suitable for learning and play purposes.

What is the difference between the Caesar cipher and ROT13?

ROT13 is the Caesar cipher with the shift amount fixed at 13. Since it is half of the 26 alphabetic characters, the same operation can be used for both encryption and decryption.

What is the key to the Vigenere cipher?

It is a method of encryption using alphabetic keywords with different shift amounts for each character. The longer and more complex the key, the more secure it is. The same key is required for encryption and decryption.

Are binary and hexadecimal conversions cryptographic?

Strictly speaking, it is not a cipher but an encoding. Because it can be undone without a key, it is used to convert data representations and for debugging and learning purposes.

Is it safe to send encrypted text to others?

AES-GCM is secure if the password (decryption key) is shared through another secure channel. Caesar ciphers and Vigenere ciphers are simplified and should not be used for sensitive data.

What should I do if I forget my encryption key?

Unfortunately, if you forget an encryption key, your encrypted data cannot be decrypted. This is actually a security feature—even the tool developers cannot recover your data without the original key. Always keep your encryption keys in a safe place, such as a password manager, to prevent data loss.

Can I encrypt very long texts with this tool?

Yes, the tool can handle texts of various lengths since everything runs locally in your browser. However, very large texts (over several megabytes) may slow down your browser temporarily. For practical purposes, you can encrypt anything from a single sentence to full documents without issues.

What is AES-GCM and why is it recommended for sensitive data?

AES-GCM (Advanced Encryption Standard in Galois/Counter Mode) is one of the most secure encryption methods available today, widely used by governments and financial institutions. It combines both encryption and authentication, meaning it can verify that your data hasn't been tampered with during transmission. This makes it ideal for protecting truly sensitive information like passwords or financial data.

What is the difference between encryption and encoding like binary or hex conversion?

Encryption scrambles your data using a mathematical algorithm and a key, making it unreadable without the correct key. Encoding simply converts data to a different format (like binary or hexadecimal) but doesn't require a key and offers no real security. While encoding might hide information from casual observers, encryption is the only method that truly protects your data from being read.

Can I use special characters or numbers in my encryption key?

Absolutely, and it's actually recommended to use a mix of uppercase, lowercase, numbers, and special characters in your key. A more complex key makes your encryption stronger and harder to crack. Just remember that the exact key—including punctuation and spacing—is needed to decrypt the message later.

How do I know if my decryption worked correctly?

If you decrypt a message successfully, the original text will appear exactly as it was before encryption. If you use the wrong key, the decryption will either fail with an error message or produce meaningless characters instead of readable text. If the result doesn't make sense, double-check your key and try again.