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Free Online DES Encryption Decryption Tool
Encrypt and decrypt data using the DES symmetric cipher algorithm online. Supports ECB and CBC modes with custom keys. All cryptographic operations run locally in your browser for complete privacy.
How to Use DES Encryption Tool
Quick Start Guide
1
Enter the text to encrypt or decrypt in the input field
2
Provide an encryption key (8 characters for DES)
3
Select the mode (ECB or CBC)
4
Click Encrypt or Decrypt and copy the result
💡Pro Tips
✓DES uses a 56-bit key: enter exactly 8 characters
✓ECB mode is simpler but less secure for repeated data
✓CBC mode adds an IV for stronger encryption
✓All encryption runs locally in your browser
Frequently Asked Questions
DES (Data Encryption Standard) is a symmetric-key block cipher that encrypts data in 64-bit blocks using a 56-bit key. It was the US federal standard for decades, now largely replaced by AES.
DES is no longer considered secure for modern applications due to its short 56-bit key. It is suitable for learning and legacy compatibility. For production, use AES encryption instead.
ECB encrypts each block independently, making patterns visible. CBC chains blocks together using an IV, producing more secure output with no visible patterns.
A DES key must be exactly 8 characters. Use random alphanumeric characters. For real security, consider AES with a 256-bit key.
Still have questions? Check out our other tools or contact us for support.
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