AES Encrypt Decrypt
AES-256-CBC, OpenSSL-compatible KDF. 100% client-side — the passphrase never leaves your browser. Interoperable with openssl enc -aes-256-cbc.
AES Encrypt Decrypt — Free Online Tool
Encrypts and decrypts text with AES-256 (CBC mode, PKCS7 padding) using a passphrase, on the client with crypto-js — useful for reversible secrets in local-only tools, encrypting configuration snippets, and learning how authenticated symmetric encryption works without a backend.
How to use the AES Encrypt Decrypt
- Open the tool above — it runs entirely in your browser, so your input never leaves this page.
- Paste or type your input into the field, then press the relevant button (e.g. Encode / Decode, Generate, or Convert).
- Copy the result from the output area with the copy button orCtrl/Cmd + C.
- No signup, no upload, and no tracking — repeat as often as you need.
Frequently asked questions
Is the AES Encrypt Decrypt free to use?
Yes. The AES Encrypt Decrypt is completely free, with no signup, no ads inside the tool, and no hidden limits.
Does the AES Encrypt Decrypt upload my data?
No. The AES Encrypt Decrypt processes everything locally in your browser. Your input is never sent to a server, so it stays private even on shared devices.
Does the AES Encrypt Decrypt work offline?
After the page loads, the AES Encrypt Decrypt runs entirely in your browser, so it keeps working without a network connection.
Free & private — why use this AES Encrypt Decrypt
The AES Encrypt Decrypt runs 100% client-side in your browser. Your data is never uploaded to a server, no account is required, and the tool is completely free. It works offline once the page has loaded and is part of a growing collection of privacy-first developer utilities.