AES Encrypt / Decrypt Online
AES加密AES解密CBCGCM
WebCrypto-based AES tool supporting CBC, CTR and GCM modes with 16/24/32-char keys, auto random IV or manual input, Base64 ciphertext, fully local.
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How to Use
- Enter plaintext and key, choose mode and padding
- Click Encrypt or Decrypt to execute
- Copy the result and keep your key safe
- All encoding/decoding runs locally; sensitive content never leaves your device
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FAQ
Which mode should I choose?
GCM offers authenticated encryption and is safest; CTR suits streaming data; CBC has the best compatibility. Encryption and decryption must use the same mode and IV.
Key requirements?
Exactly 16, 24 or 32 characters for AES-128/192/256; use the identical key for both directions.
Will my data be uploaded?
No, all operations run locally in your browser.