Triple DES (3DES) Encryption/Decryption Tool

Triple DES (3DES) applies the DES cipher algorithm three times to each data block, providing significantly stronger security than single DES. This tool supports multiple encryption modes (ECB, CBC, CFB, OFB, CTR), padding schemes, and input/output formats.

Encrypt
The key must be 16 or 24 bytes for Triple DES.
IV is required for CBC mode. Must be 8 bytes.
Decrypt
The key must be 16 or 24 bytes for Triple DES.
IV is required for CBC mode. Must be 8 bytes.
What is Triple DES (3DES)?

Triple DES (3DES or TDES) is a symmetric-key block cipher that applies the DES cipher algorithm three times to each data block. It was designed to provide a more secure alternative to DES without requiring a completely new algorithm.

While 3DES is significantly more secure than DES, it is slower and considered legacy technology. Modern applications should use AES (Advanced Encryption Standard) for better performance and security.

Key Features
  • Block size: 64 bits (8 bytes), same as DES
  • Key size: 112 bits (2-key) or 168 bits (3-key) effective strength
  • Supports multiple modes: ECB, CBC, CFB, OFB, and CTR
  • Multiple padding schemes: PKCS7, Zero Padding, No Padding, ANSI X.923, ISO 10126
Security Notice

3DES is considered deprecated by modern security standards (NIST deprecated it in 2017, with full disallowance by 2023). While still more secure than single DES, it is slower and less efficient than AES.

For new applications, use AES-256 which provides superior security and performance. 3DES should only be used for legacy system compatibility.

Privacy & Security

All encryption and decryption operations are performed locally in your browser using CryptoJS library. No data is sent to our servers, ensuring your information remains completely private and secure.