AES Decrypt Online

Decrypting AES text

This tool turns AES encrypted text back into readable form. You need exactly the same key that was used to encrypt it.

If the key is wrong, you will get no readable output or an outright error — a wrong key never produces partially correct text.

How to use it

Paste the encrypted text, enter the matching key and start the decryption.

Make sure the encrypted text is pasted in full and without extra line breaks, which are a common cause of failure.

Limits of this approach

AES is a widely used, well-regarded algorithm. Its security depends heavily on the quality and secrecy of the key rather than the algorithm itself.

This tool is meant for experimenting and for simple tasks. To protect genuinely sensitive data, use software built for that purpose with proper key management.

Frequently asked questions

What happens if I forget the key?

The content becomes inaccessible. There is no backdoor that recovers encrypted text without its key.

Does my input leave the device?

Processing runs in the browser. Even so, avoid pasting confidential material if you would rather it were not processed at all.

Is AES enough for confidential documents?

The algorithm itself is considered sound, but key length, key handling and how you transmit the result matter just as much. For genuinely sensitive material, use dedicated software.