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AES Decrypt

Decrypt AES ciphertext back to plaintext.

Note: The key is derived from the password with SHA-256 and a fresh random IV is used for every encryption. The output format is iv:ciphertext as lowercase hex. For AES-GCM the ciphertext is authenticated (tamper and wrong-password detection); CBC and CTR are not — use GCM for secure data.

What Is a AES Decrypt?

The AES Decrypt tool decrypts AES ciphertext back into plaintext entirely in your browser. It accepts the iv:ciphertext format produced by the AES Encrypt tools and reconstructs the original text using the password you provide.

How to Use This AES Decrypt

  1. 1
    Choose ModeSelect the same mode used for encryption (GCM, CBC, or CTR).
  2. 2
    Enter PasswordType the password that was used to encrypt.
  3. 3
    Paste CiphertextPaste the iv:ciphertext hex string and click Decrypt.

Frequently Asked Questions

AES-GCM includes an authentication tag. Wrong passwords, tampered ciphertext, or corrupted IVs cause decryption to fail with an error instead of returning garbage.
Yes, as long as it uses the same mode, the same key derivation (SHA-256 of the password), and the same iv:ciphertext hex format used by this tool.