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Crypto & Security / Local encryption

AES Text Encryptor & Decryptor

Use the Web Crypto API to encrypt and decrypt sensitive text locally with AES-GCM or AES-CBC.

Back to Converter HubWeb Crypto Local browser processing

AES text encryption

Enter a key and text to encrypt or decrypt in this tab; AES-GCM is the recommended authenticated mode.

Progress0%

The key and text are processed only in this browser tab.

Output result

Waiting for an encryption or decryption result.
Features and quick guide

AES Text Encryptor & Decryptor

Useful for short sensitive text that should remain in the local browser workflow.

3-step quick guide

  1. 1
    Enter a custom key and plaintext.
  2. 2
    Choose AES-GCM or AES-CBC.
  3. 3
    Save the envelope; paste it back with the same key to decrypt.

Privacy promise

Files and text stay in this browser tab; no upload endpoint is used.

No login or server-side file processing is used.

Frequently asked questions

Which mode should I choose?

Choose AES-GCM for normal use because it authenticates the ciphertext; AES-CBC is retained only for legacy compatibility.

Is the key saved?

No. The key stays in this tab memory and is never sent to a server.

Does this replace a password manager?

No. This is a local short-text utility, not a full key-management or long-term secret-storage system.