3DES Encrypt

Encrypt or decrypt text with Triple DES in CBC mode.

Passphrase

Plaintext

Note: 3DES (Triple DES) runs DES three times in an encrypt-decrypt-encrypt chain with a 24-byte key derived from your passphrase via SHA-256. Output format is iv:ciphertext hex. 3DES is legacy — prefer AES for new systems.

What Is a 3DES Encrypt?

The 3DES Encrypt tool encrypts and decrypts text with Triple DES (3DES) in CBC mode. 3DES runs DES three times in an encrypt-decrypt-encrypt chain using a 24-byte key, giving stronger security than single DES. This free online tool is useful for 3DES encryption tool, Triple DES online, 3DES decrypt. Common use cases include legacy interoperability, old data formats, cryptography education, and migration testing. It is designed for quick browser-based hashing, encoding, decoding, encryption testing, checksum comparison, identifier generation, and cryptography education. For production security, follow the algorithm's current standards, key-management requirements, and application-specific security guidance.

How to Use This 3DES Encrypt

1
Choose the algorithm or modeSelect the encryption method supported by the tool.
2
Enter the required key materialProvide the password, key, and nonce/IV in the format requested.
3
Enter the dataPaste plaintext for encryption or ciphertext for decryption.
4
Run the operationThe browser performs the cryptographic transformation locally.
5
Verify the resultFor real applications, follow the algorithm's nonce, key-management, authentication, and interoperability requirements.

Frequently Asked Questions

Its 64-bit block size makes it vulnerable to Sweet32 birthday attacks at high volumes, and DES is slow in software. NIST deprecated 3DES; AES is the recommended replacement.

A random 8-byte IV followed by the ciphertext, joined as iv:ciphertext in lowercase hex. The IV is required for decryption.

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