AES Encrypt / Decrypt Online – AES-256 Text Encryption

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Advanced options (salt / IV / iterations)

Decrypt reads salt and IV from the ciphertext. Enter the same iterations used to encrypt.

About this tool

Encrypt any text with AES-256-GCM directly in your browser. A random salt and IV are generated by default and the key is derived from your passphrase with PBKDF2 (100,000 iterations). The result is a single Base64 blob (salt + IV + ciphertext) that can normally be decrypted later with the same passphrase; if you override the iteration count in the advanced options, enter the same count when decrypting. No data ever leaves your device.

How to use
  1. Type or paste your text into the input box.
  2. Enter a passphrase you will remember.
  3. Click Encrypt to get a Base64 ciphertext, or paste a ciphertext and click Decrypt to recover the original text.
Is my data uploaded anywhere?

No. Encryption and decryption happen entirely in your browser.

What encryption is used?

AES-256-GCM with a key derived from your passphrase using PBKDF2-SHA256 with 100,000 iterations.