🔒 AES Encryption Tool
★★★★½ 4.6 (194 ratings)
🔒 Client-side — Your data never leaves your browser ✅ 100% Free — No signup, no limits ⚡ Instant — No server processing

📋 How to Use

  1. 输入文本 — 在输入框中输入需要加密的明文或需要解密的密文。
  2. 设置密钥 — 输入加密密钥（密码）。密钥长度决定AES级别：16字符=AES-128，24字符=AES-192，32字符=AES-256。
  3. 选择模式和输出格式 — 选择加密模式（推荐CBC）和输出格式（Base64或Hex），点击加密或解密按钮。

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AES-256 · CBC/ECB · Client-Side · Keys Never Leave Your Browser

❓ Frequently Asked Questions

Is AES encryption secure?

AES is one of the most secure symmetric encryption algorithms, used by the US government for classified information. AES-256 with a 256-bit key would take millions of years to brute-force. Keys never leave your browser.

What's the difference between ECB and CBC?

ECB encrypts each block independently - less secure as identical plaintext produces identical ciphertext. CBC XORs each block with the previous ciphertext block before encryption for better security. CBC requires an IV for unique results each time. Use CBC mode.

What is the difference between AES-128, 192, and 256?

The difference is key length: AES-128 = 16 bytes, AES-192 = 24 bytes, AES-256 = 32 bytes. Longer keys are more secure. This tool automatically selects the AES variant based on your key length.