Triple DES Decryption
Decrypt Triple DES (3DES) text or files online using CBC, CTR, CFB, OFB, or ECB, with configurable padding, PBKDF2, EvpKDF, or HKDF. Read more
Triple DES decryption online
Triple DES decryption reverses 3DES or TDEA ciphertext using the matching two-key or three-key configuration. The cipher applies DES three times but retains a 64-bit block size. NIST withdrew its TDEA recommendation on January 1, 2024; remaining use is limited to operations such as recovering already-protected data.
How to use this tool
Paste encoded ciphertext or select a local file, then choose the original key-size variant, mode, and padding. Enter the exact component keys and IV, or reproduce the KDF settings and secret input used by the source. Decrypt and view or download the recovered bytes.
Matching cipher parameters
Every byte-level parameter must match the source implementation or Triple DES encryption. Hex and Base64 represent ciphertext bytes; they do not identify the TDEA variant, mode, or padding. KDF salt is not interchangeable with the IV.
The standalone PBKDF2, EvpKDF, and HKDF tools can help compare derived bytes, but Triple DES decryption still requires the final key material, IV, mode, and padding to match.
Security warning
Use Triple DES decryption only for compatibility or recovery. For currently supported designs, prefer AES decryption with an authenticated format. Wrong settings may yield an error or meaningless data, and successful output does not authenticate the ciphertext.
Frequently asked questions
Why can I not recover the original plaintext?
Confirm two-key versus three-key TDEA, component-key order, mode, padding, IV, and ciphertext encoding. For KDF-derived keys, match the secret input, KDF, hash, salt, and KDF-specific settings such as iterations or info as well.
Does encryption detect tampering?
No. Triple DES alone has no authentication tag. An error or readable plaintext is not proof that the ciphertext is genuine and unchanged.
