Text Encryptor/Decryptor
Secure your text with multiple encryption algorithms
AES-256 Encryption
Advanced Encryption Standard with 256-bit key. Military-grade security. Requires a password.
Security Notice
All encryption happens in your browser. Your data never leaves your device. For maximum security, use strong passwords and keep them safe.
How to Use This Encryption Tool
Step-by-Step Guide
Enter Your Text
Type or paste the text you want to encrypt or decrypt into the input box.
Choose Algorithm
Select from AES-256 (most secure), Base64, Caesar Cipher, or XOR encryption.
Set Password/Key
Enter a strong password (required for AES). Use password generator for security.
Encrypt/Decrypt
Choose operation (encrypt or decrypt) and click the process button.
Copy or Save
Copy the result to clipboard or download as a text file for safekeeping.
Common Use Cases
Secure Messages
Encrypt sensitive messages before sharing via email or chat.
Password Storage
Store encrypted passwords or sensitive notes locally.
Developer Testing
Test encryption/decryption logic for application development.
Education
Learn about different encryption algorithms and how they work.
Security Best Practices
- Use AES-256 for maximum security with sensitive data
- Always use strong, unique passwords for encryption
- Never share encryption passwords through the same channel as encrypted text
- Base64 is not encryption - it's encoding that can be easily reversed
- For real security, use this tool offline or ensure you trust the environment
Encryption Algorithm Comparison
| Algorithm | Security Level | Key Required | Best For | Limitations |
|---|---|---|---|---|
| AES-256 | Military Grade | Yes, password | Sensitive data, passwords | Requires password management |
| Base64 | No Security | No | Data encoding, not encryption | Easily reversible, not secure |
| Caesar Cipher | Basic | Shift number (1-25) | Education, simple obfuscation | Easy to crack, only 25 possibilities |
| XOR Cipher | Low Security | Yes, any string | Simple protection, learning | Weak against cryptoanalysis |
Important Security Note
While this tool provides encryption capabilities, for truly sensitive information (financial data, personal identifiers, etc.), consider using professionally audited encryption software. This tool is best suited for learning, testing, and protecting non-critical information.
Frequently Asked Questions
Your data never leaves your browser. All encryption and decryption happens locally on your device using JavaScript. We don't have servers receiving your text, passwords, or encrypted data. This is a 100% client-side tool.
Privacy Guaranteed: No network requests are made when encrypting/decrypting text.
AES-256 is a modern, military-grade encryption standard used by governments worldwide. It's extremely secure when used with a strong password.
Base64 is not encryption at all - it's encoding. It converts binary to text but offers no security as it can be easily decoded by anyone.
Caesar Cipher is a historical encryption method that shifts letters by a fixed number. It's easily broken and used mainly for educational purposes.
XOR Cipher is a basic encryption method that's weak against analysis but useful for simple obfuscation and learning about encryption principles.
No, and this is by design. AES encryption without the password is mathematically infeasible to break with current technology. If you lose your password, the encrypted data is permanently inaccessible.
Important: Always store your encryption passwords securely using a password manager. We cannot recover lost passwords - that's what makes AES secure.
Yes! The tool is fully responsive and works on smartphones, tablets, and desktop computers. All features are available on mobile devices.
Mobile Features
- • Touch-friendly interface
- • Responsive design
- • Full encryption functionality
- • Copy/paste from mobile clipboard
Desktop Features
- • Larger text areas
- • Keyboard shortcuts
- • Easier password entry
- • Better for long texts
For small to medium texts (up to 10,000 characters), the tool works well. For very large documents:
- Performance may degrade with texts over 50,000 characters
- Browser memory limits may be reached with extremely large files
- For large documents, consider splitting into smaller chunks
- For professional large-scale encryption, use dedicated software