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AES Encryption

Free online AES Encryption tool. Encrypt text with a secret key using Advanced Encryption Standard (AES). Decrypt encrypted strings back to text.

100% Private (In-Browser)Instant Web Worker SpeedZero Server Upload
AES Encryption by Privacy-First Toolbox is a 100% free, client-side browser utility. It processes your files locally on your computer or smartphone using HTML5 and Web Workers—zero bytes of your files or data are ever uploaded to any external server.
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Key Features

  • AES Encryption & Decryption
  • Custom Secret Key
  • Client-side security (Zero knowledge)
  • Copy/Paste support

Common Use Cases

  • Sending secret messages
  • Securing sensitive notes
  • Testing encryption logic

Frequently Asked Questions