Encrypt/Decrypt Text Tool
Encrypt any text with a password to turn it into unreadable ciphertext, or decrypt ciphertext back to plain text using the correct password. Encryption runs entirely in your browser using the AES algorithm — your text and password are never transmitted anywhere.
How to Use the Encrypt/Decrypt Text Tool
- Choose "Encrypt" to scramble plain text, or "Decrypt" to unscramble ciphertext.
- Paste your text (or the ciphertext you received) into the text box.
- Enter a password — use the exact same password to decrypt that you used to encrypt.
- Click "Run" and copy the result. Keep the password safe: without it, encrypted text cannot be recovered.
Why Use This Tool?
Is my text or password ever sent to a server?
No. Encryption and decryption happen entirely inside your browser using the CryptoJS library's AES implementation, loaded once as a static script from a CDN. Your plain text, ciphertext and password never leave your device and are not logged anywhere.
What happens if I use the wrong password to decrypt?
You'll see a friendly "Wrong password or invalid data" message rather than garbled text. AES decryption with an incorrect password typically produces no valid readable output, and this tool detects that case automatically instead of showing you meaningless characters.
What is AES encryption?
AES (Advanced Encryption Standard) is a widely trusted symmetric encryption algorithm used to protect everything from Wi-Fi traffic to government data. "Symmetric" means the same password is used to both encrypt and decrypt — so it's essential to remember or securely store the password you choose.
What should I use this for?
This tool is handy for quickly protecting a note, message, or snippet of sensitive text before sharing it through an insecure channel like email or chat — the recipient simply needs the same password to decrypt it. It is not a replacement for full disk encryption or dedicated secure-messaging apps for highly sensitive data.